WO2002021855A3 - Tone detection for integrated telecommunications processing - Google Patents

Tone detection for integrated telecommunications processing Download PDF

Info

Publication number
WO2002021855A3
WO2002021855A3 PCT/US2001/027489 US0127489W WO0221855A3 WO 2002021855 A3 WO2002021855 A3 WO 2002021855A3 US 0127489 W US0127489 W US 0127489W WO 0221855 A3 WO0221855 A3 WO 0221855A3
Authority
WO
WIPO (PCT)
Prior art keywords
tone
tones
detection processor
tone detection
determining
Prior art date
Application number
PCT/US2001/027489
Other languages
French (fr)
Other versions
WO2002021855A2 (en
Inventor
Adam B Strauss
Anurag Bist
Stan Hsieh
Zhen Zhu
Raghavendra S Prabhu
Original Assignee
Intel Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Intel Corp filed Critical Intel Corp
Priority to DE60128373T priority Critical patent/DE60128373D1/en
Priority to AU2001290621A priority patent/AU2001290621A1/en
Priority to EP01970637A priority patent/EP1317858B1/en
Priority to CA002422203A priority patent/CA2422203C/en
Publication of WO2002021855A2 publication Critical patent/WO2002021855A2/en
Publication of WO2002021855A3 publication Critical patent/WO2002021855A3/en
Priority to HK03106122A priority patent/HK1053935A1/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q1/00—Details of selecting apparatus or arrangements
    • H04Q1/18—Electrical details
    • H04Q1/30—Signalling arrangements; Manipulation of signalling currents
    • H04Q1/44—Signalling arrangements; Manipulation of signalling currents using alternate current
    • H04Q1/444—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies
    • H04Q1/46—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies comprising means for distinguishing between a signalling current of predetermined frequency and a complex current containing that frequency, e.g. speech current

Abstract

Disclosed is an integrated tone detection processor for discriminating between tone and voice signals and determining the tones. The tone detection processor performs Automatic Gain Control (AGC) to normalize the power of the tone or voice signal. Further, the energy of the tone or voice signals are determined at specific frequencies utilizing a Goertzel Filter process. The tone detection processor determines whether or not a tone is present, and if a tone exists, determines the type of tone. Based upon determining the two maximum energy levels of the Goertzel filtered tone, whether the tone is a single tone, dual tone, silence, or other (e.g. speech) can be discriminated. The tone can then be identified by a user-defined dictionary of tones. Based upon various ON and OFF cadence checks in combination with the use of TONE ON and TONE OFF counters, tones can be declared.
PCT/US2001/027489 2000-09-08 2001-09-05 Tone detection for integrated telecommunications processing WO2002021855A2 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
DE60128373T DE60128373D1 (en) 2000-09-08 2001-09-05 SOUND DETECTION FOR INTEGRATED TELECOMUNICATION PROCESSING
AU2001290621A AU2001290621A1 (en) 2000-09-08 2001-09-05 Tone detection for integrated telecommunications processing
EP01970637A EP1317858B1 (en) 2000-09-08 2001-09-05 Tone detection for integrated telecommunications processing
CA002422203A CA2422203C (en) 2000-09-08 2001-09-05 Tone detection for integrated telecommunications processing
HK03106122A HK1053935A1 (en) 2000-09-08 2003-08-26 Tone detection for integrated telecommunications processing

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US23109000P 2000-09-08 2000-09-08
US60/231,090 2000-09-08
US09/938,699 2001-08-23
US09/938,699 US7003093B2 (en) 2000-09-08 2001-08-23 Tone detection for integrated telecommunications processing

Publications (2)

Publication Number Publication Date
WO2002021855A2 WO2002021855A2 (en) 2002-03-14
WO2002021855A3 true WO2002021855A3 (en) 2003-01-16

Family

ID=26924812

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2001/027489 WO2002021855A2 (en) 2000-09-08 2001-09-05 Tone detection for integrated telecommunications processing

Country Status (9)

Country Link
US (1) US7003093B2 (en)
EP (1) EP1317858B1 (en)
CN (1) CN1244240C (en)
AT (1) ATE362277T1 (en)
AU (1) AU2001290621A1 (en)
CA (1) CA2422203C (en)
DE (1) DE60128373D1 (en)
HK (1) HK1053935A1 (en)
WO (1) WO2002021855A2 (en)

Families Citing this family (57)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6765931B1 (en) * 1999-04-13 2004-07-20 Broadcom Corporation Gateway with voice
GB2350532B (en) * 1999-05-28 2001-08-08 Mitel Corp Method to generate telephone comfort noise during silence in a packetized voice communication system
ATE388542T1 (en) * 1999-12-13 2008-03-15 Broadcom Corp VOICE THROUGH DEVICE WITH DOWNWARD VOICE SYNCHRONIZATION
US7035293B2 (en) * 2001-04-18 2006-04-25 Broadcom Corporation Tone relay
US20040190499A1 (en) * 2001-05-01 2004-09-30 Mindspeed Technologies, Inc. Method and system for configuring gateways to facilitate a modem connection over a packet network
US6763486B2 (en) * 2001-05-09 2004-07-13 Agilent Technologies, Inc. Method and apparatus of boundary scan testing for AC-coupled differential data paths
FR2831010B1 (en) * 2001-10-12 2005-04-01 Cit Alcatel NODE FOR RELAYING TELECOMMUNICATION SIGNALS
ATE445354T1 (en) * 2001-12-10 2009-10-15 Medic4All Ag VISUAL MEDICAL MONITORING SYSTEM FOR A REMOTE PERSON
US7035394B2 (en) * 2001-12-17 2006-04-25 Ricoh Company, Ltd. Tone detector judging a detection of a predetermined tone signal by comparing a characteristic quantity of the tone signal with characteristic quantities of other signals
US20030123574A1 (en) * 2001-12-31 2003-07-03 Simeon Richard Corpuz System and method for robust tone detection
US7043006B1 (en) * 2002-02-13 2006-05-09 Aastra Intecom Inc. Distributed call progress tone detection system and method of operation thereof
AU2002239053A1 (en) * 2002-03-25 2003-10-08 Allied-Telesis, K.K. Facsimile-communicable voip terminal and communication method thereof
US8023502B2 (en) 2002-08-14 2011-09-20 At&T Intellectual Property I, L.P. Load testing for IP PBX systems
US20040179555A1 (en) * 2003-03-11 2004-09-16 Cisco Technology, Inc. System and method for compressing data in a communications environment
US6950511B2 (en) * 2003-11-13 2005-09-27 Avaya Technology Corp. Detection of both voice and tones using Goertzel filters
US7733793B1 (en) * 2003-12-10 2010-06-08 Cisco Technology, Inc. System and method for suppressing silence data in a network environment
KR100546780B1 (en) * 2003-12-26 2006-01-25 한국전자통신연구원 Voice over packet system using a plurality of digital signal processors and speech processing method therein
US7743164B2 (en) * 2004-02-13 2010-06-22 Alcatel-Lucent Usa Inc. Method and apparatus for transmitting frequency shift key data in a packetized format
US7844048B2 (en) * 2004-03-08 2010-11-30 Freescale Semiconductor, Inc. Selective tone event detector and method therefor
WO2005124722A2 (en) * 2004-06-12 2005-12-29 Spl Development, Inc. Aural rehabilitation system and method
US20060093997A1 (en) * 2004-06-12 2006-05-04 Neurotone, Inc. Aural rehabilitation system and a method of using the same
US7917356B2 (en) 2004-09-16 2011-03-29 At&T Corporation Operating method for voice activity detection/silence suppression system
GB2430832B (en) * 2005-09-30 2007-06-06 Trinity Convergence Inc Systems and methods for dual-tone multiple frequency symbol detection
US20070115949A1 (en) * 2005-11-17 2007-05-24 Microsoft Corporation Infrastructure for enabling high quality real-time audio
US7804954B2 (en) * 2005-11-17 2010-09-28 Microsoft Corporation Infrastructure for enabling high quality real-time audio
US8483384B2 (en) * 2006-03-06 2013-07-09 Freescale Semiconductor, Inc. Enhanced tone detector including adaptive multi-bandpass filter for tone detection and enhancement
JP4847270B2 (en) * 2006-10-12 2011-12-28 キヤノン株式会社 Facsimile device, control method therefor, program, and storage medium
US8050397B1 (en) * 2006-12-22 2011-11-01 Cisco Technology, Inc. Multi-tone signal discriminator
WO2008145800A1 (en) * 2007-05-25 2008-12-04 Nokia Corporation Interference mitigation
CN101110217B (en) * 2007-07-25 2010-10-13 北京中星微电子有限公司 Automatic gain control method for audio signal and apparatus thereof
US8515052B2 (en) 2007-12-17 2013-08-20 Wai Wu Parallel signal processing system and method
WO2009141683A1 (en) 2008-05-19 2009-11-26 Freescale Semiconductor, Inc. Method and apparatus for detecting a set up signal used for data communication over a communication network
US8804700B2 (en) 2008-07-16 2014-08-12 Freescale Semiconductor, Inc. Method and apparatus for detecting one or more predetermined tones transmitted over a communication network
US8755515B1 (en) * 2008-09-29 2014-06-17 Wai Wu Parallel signal processing system and method
WO2010138014A1 (en) * 2009-05-28 2010-12-02 Lsi Corporation HIGH-PERFORMANCE TONE DETECTION USING A DIGITAL SIGNAL PROCESSOR (DSP) HAVING MULTIPLE ARITHMETIC LOGIC UNITS (ALUs)
US9773431B2 (en) * 2009-11-10 2017-09-26 Maxim Integrated Products, Inc. Block encryption security for integrated microcontroller and external memory system
EP2472807A4 (en) * 2009-12-10 2013-01-02 Huawei Tech Co Ltd Method, apparatus and system for speech coding and decoding
JP5424936B2 (en) * 2010-02-24 2014-02-26 パナソニック株式会社 Communication terminal and communication method
US8797518B2 (en) 2010-10-07 2014-08-05 At&T Intellectual Property I, L.P. Identifiable visible light sources for fiber optic cables
JP5605158B2 (en) * 2010-10-19 2014-10-15 アイコム株式会社 Tone signal circuit for CTCSS and radio receiver using the same
JP5778978B2 (en) * 2011-05-11 2015-09-16 キヤノン株式会社 Image processing apparatus, control method thereof, and program
US9824677B2 (en) 2011-06-03 2017-11-21 Cirrus Logic, Inc. Bandlimiting anti-noise in personal audio devices having adaptive noise cancellation (ANC)
US8958571B2 (en) 2011-06-03 2015-02-17 Cirrus Logic, Inc. MIC covering detection in personal audio devices
US8750494B2 (en) * 2011-08-17 2014-06-10 Alcatel Lucent Clock skew compensation for acoustic echo cancellers using inaudible tones
US9123321B2 (en) * 2012-05-10 2015-09-01 Cirrus Logic, Inc. Sequenced adaptation of anti-noise generator response and secondary path response in an adaptive noise canceling system
US9532139B1 (en) 2012-09-14 2016-12-27 Cirrus Logic, Inc. Dual-microphone frequency amplitude response self-calibration
CN103050119B (en) * 2012-12-30 2015-06-17 安徽科大讯飞信息科技股份有限公司 Self-adaptive detection method for synchronism of lamplight/motor and sound
CN104019885A (en) 2013-02-28 2014-09-03 杜比实验室特许公司 Sound field analysis system
US9414150B2 (en) 2013-03-14 2016-08-09 Cirrus Logic, Inc. Low-latency multi-driver adaptive noise canceling (ANC) system for a personal audio device
WO2014151813A1 (en) 2013-03-15 2014-09-25 Dolby Laboratories Licensing Corporation Normalization of soundfield orientations based on auditory scene analysis
DE102014207417A1 (en) * 2014-04-17 2015-10-22 Robert Bosch Gmbh Interface unit
US9704507B2 (en) * 2014-10-31 2017-07-11 Ensequence, Inc. Methods and systems for decreasing latency of content recognition
US10523823B2 (en) * 2015-06-18 2019-12-31 Intel Corporation Dual-tone multi-frequency digit detection in a wireless communication system
KR20180044324A (en) 2015-08-20 2018-05-02 시러스 로직 인터내셔널 세미컨덕터 리미티드 A feedback adaptive noise cancellation (ANC) controller and a method having a feedback response partially provided by a fixed response filter
US9503568B1 (en) 2016-06-30 2016-11-22 Captioncall, Llc Detecting dial tone on a telephone line
US10692515B2 (en) * 2018-04-17 2020-06-23 Fortemedia, Inc. Devices for acoustic echo cancellation and methods thereof
CN111740614B (en) * 2020-06-24 2024-04-12 东北电力大学 Y-source two-stage matrix converter analysis method based on state space average model

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0576980A2 (en) * 1992-07-03 1994-01-05 Telefonaktiebolaget Lm Ericsson A method of improving sensitivity and speech immunity of a multifrequency receiver
US5325425A (en) * 1990-04-24 1994-06-28 The Telephone Connection Method for monitoring telephone call progress
WO1999029085A2 (en) * 1997-11-27 1999-06-10 Northern Telecom Limited Method and apparatus for detecting tones

Family Cites Families (46)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4570260A (en) * 1983-12-02 1986-02-11 Stromberg-Carlson Corporation Digital tone signal generator for telephony system
JPS60121856A (en) 1983-12-06 1985-06-29 Nec Corp Detecting circuit of single frequency signal
US5142677A (en) 1989-05-04 1992-08-25 Texas Instruments Incorporated Context switching devices, systems and methods
US4969118A (en) 1989-01-13 1990-11-06 International Business Machines Corporation Floating point unit for calculating A=XY+Z having simultaneous multiply and add
JPH0748681B2 (en) 1989-02-23 1995-05-24 日本電気株式会社 Echo canceller coefficient control method
US5341374A (en) 1991-03-01 1994-08-23 Trilan Systems Corporation Communication network integrating voice data and video with distributed call processing
US5241492A (en) 1991-05-06 1993-08-31 Motorola, Inc. Apparatus for performing multiply and accumulate instructions with reduced power and a method therefor
JPH06150023A (en) 1992-11-06 1994-05-31 Hitachi Ltd Microcomputer and system thereof
US5452289A (en) 1993-01-08 1995-09-19 Multi-Tech Systems, Inc. Computer-based multifunction personal communications system
KR960700602A (en) * 1993-01-14 1996-01-20 세이버리 그레도빌레 TELEPHONE NETWORK PERFORMANCE MONITORING METHOD AND SYSTEM
US6154828A (en) 1993-06-03 2000-11-28 Compaq Computer Corporation Method and apparatus for employing a cycle bit parallel executing instructions
JP3532975B2 (en) 1993-09-27 2004-05-31 株式会社ルネサステクノロジ Microcomputer and method of executing instructions using the same
CA2116043C (en) * 1994-02-21 1997-09-23 Alexander F. Tulai Programmable digital call progress tone detector
US5574927A (en) 1994-03-25 1996-11-12 International Meta Systems, Inc. RISC architecture computer configured for emulation of the instruction set of a target computer
US5499272A (en) 1994-05-31 1996-03-12 Ericsson Ge Mobile Communications Inc. Diversity receiver for signals with multipath time dispersion
US5541917A (en) 1994-09-12 1996-07-30 Bell Atlantic Video and TELCO network control functionality
US5604771A (en) * 1994-10-04 1997-02-18 Quiros; Robert System and method for transmitting sound and computer data
JP3579843B2 (en) 1994-10-24 2004-10-20 日本テキサス・インスツルメンツ株式会社 Digital signal processor
US5530663A (en) 1994-11-14 1996-06-25 International Business Machines Corporation Floating point unit for calculating a compound instruction A+B×C in two cycles
BR9509870A (en) 1994-12-08 1997-11-25 Intel Corp Method and apparatus for allowing a processor to access an external component via a private bus or a shared bus
JP3094832B2 (en) 1995-03-24 2000-10-03 三菱電機株式会社 Signal discriminator
US5727194A (en) 1995-06-07 1998-03-10 Hitachi America, Ltd. Repeat-bit based, compact system and method for implementing zero-overhead loops
FI110826B (en) 1995-06-08 2003-03-31 Nokia Corp Eliminating an acoustic echo in a digital mobile communication system
JP2931890B2 (en) 1995-07-12 1999-08-09 三菱電機株式会社 Data processing device
US5598466A (en) 1995-08-28 1997-01-28 Intel Corporation Voice activity detector for half-duplex audio communication system
US5983253A (en) 1995-09-05 1999-11-09 Intel Corporation Computer system for performing complex digital filters
US6058408A (en) 1995-09-05 2000-05-02 Intel Corporation Method and apparatus for multiplying and accumulating complex numbers in a digital filter
JP3767930B2 (en) 1995-11-13 2006-04-19 沖電気工業株式会社 Information recording / reproducing method and information storage device
US5826072A (en) 1995-11-13 1998-10-20 Oasis Design, Inc. Pipelined digital signal processor and signal processing system employing same
US5881060A (en) 1996-05-30 1999-03-09 Northern Telecom Limited Integrated cellular voice and digital packet data telecommunications systems and methods for their operation
JP3658072B2 (en) 1996-02-07 2005-06-08 株式会社ルネサステクノロジ Data processing apparatus and data processing method
US5940785A (en) 1996-04-29 1999-08-17 International Business Machines Corporation Performance-temperature optimization by cooperatively varying the voltage and frequency of a circuit
US6023470A (en) * 1996-05-17 2000-02-08 Lee; Warren S. Point of presence (POP) for digital facsimile network with virtual POPs used to communicate with other networks
US5809133A (en) * 1996-05-24 1998-09-15 Advanced Micro Devices, Inc. DTMF detector system and method which performs frequency domain energy calculations with improved performance
DE19625569A1 (en) 1996-06-26 1998-01-02 Philips Patentverwaltung Signal processor
WO1998006030A1 (en) 1996-08-07 1998-02-12 Sun Microsystems Multifunctional execution unit
DE19639703C2 (en) 1996-09-26 1999-05-20 Siemens Ag Method and arrangement for echo cancellation
KR100201776B1 (en) 1996-11-06 1999-06-15 김영환 Adaptive equalizer
US5880984A (en) 1997-01-13 1999-03-09 International Business Machines Corporation Method and apparatus for performing high-precision multiply-add calculations using independent multiply and add instruments
US6212374B1 (en) * 1997-06-23 2001-04-03 Paradyne Corporation Disabling of echo cancelers after call startup
US6029267A (en) 1997-11-25 2000-02-22 Lucent Technologies Inc. Single-cycle, soft decision, compare-select operation using dual-add processor
US6172985B1 (en) * 1998-01-28 2001-01-09 Gateway 2000, Inc. Automatic detection of pots line
US5995122A (en) 1998-04-30 1999-11-30 Intel Corporation Method and apparatus for parallel conversion of color values from a single precision floating point format to an integer format
US6188981B1 (en) 1998-09-18 2001-02-13 Conexant Systems, Inc. Method and apparatus for detecting voice activity in a speech signal
US6381330B1 (en) * 1998-12-22 2002-04-30 Agere Systems Guardian Corp. False tone detect suppression using multiple frame sweeping harmonic analysis
US6330660B1 (en) 1999-10-25 2001-12-11 Vxtel, Inc. Method and apparatus for saturated multiplication and accumulation in an application specific signal processor

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5325425A (en) * 1990-04-24 1994-06-28 The Telephone Connection Method for monitoring telephone call progress
EP0576980A2 (en) * 1992-07-03 1994-01-05 Telefonaktiebolaget Lm Ericsson A method of improving sensitivity and speech immunity of a multifrequency receiver
WO1999029085A2 (en) * 1997-11-27 1999-06-10 Northern Telecom Limited Method and apparatus for detecting tones

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
FELDER M D ET AL: "EFFICIENT DUAL-TONE MULTIFREQUENCY DETECTION USING THE NONUNIFORM DISCRETE FOURIER TRANSFORM", IEEE SIGNAL PROCESSING LETTERS, IEEE SIGNAL PROCESSING SOCIETY, US, vol. 5, no. 7, 1 July 1998 (1998-07-01), pages 160 - 163, XP000766935, ISSN: 1070-9908 *
TEXAS INSTRUMENTS: "DTMF TONE GENERATION AND DETECTION", DIGITAL SIGNAL PROCESSING SOLUTIONS, 1997, XP002216176, Retrieved from the Internet <URL:http://sulcata6.cs.ccu.edu.tw/~vlsi/data/c54x/spra096.pdf> [retrieved on 20021009] *

Also Published As

Publication number Publication date
EP1317858A2 (en) 2003-06-11
HK1053935A1 (en) 2003-11-07
WO2002021855A2 (en) 2002-03-14
CA2422203A1 (en) 2002-03-14
AU2001290621A1 (en) 2002-03-22
US7003093B2 (en) 2006-02-21
CN1473442A (en) 2004-02-04
ATE362277T1 (en) 2007-06-15
CA2422203C (en) 2007-01-16
DE60128373D1 (en) 2007-06-21
EP1317858B1 (en) 2007-05-09
US20020076034A1 (en) 2002-06-20
CN1244240C (en) 2006-03-01

Similar Documents

Publication Publication Date Title
WO2002021855A3 (en) Tone detection for integrated telecommunications processing
US4764966A (en) Method and apparatus for voice detection having adaptive sensitivity
CN100588209C (en) Telephone and method for processing audio single in the telephone
EP0734012A3 (en) Signal discrimination circuit
MX9601995A (en) Tone detector with improved performance in the presence of speech.
FI961158A0 (en) voice detector
BR9902991A (en) Method for providing microphone / speaker operation and method for operating a portable communication device in microphone / speaker mode
WO2001073751A8 (en) Speech presence measurement detection techniques
KR100265908B1 (en) Hands-free telephone
WO1999060697A1 (en) Voice operated switch for use in high noise environments
JPS6420767A (en) Voice switch device
JPS5491009A (en) Audio recognition unit
JPS6420798A (en) Sound collector
JPS5491008A (en) Audio recognition unit
JPS6481997A (en) Voice detection system
JP3784431B2 (en) Tone detection device and tone detection method
CA1293060C (en) Method and apparatus for voice detection having adaptive sensitivity
JPS6367199B2 (en)
SU824484A1 (en) Voice-frequency ringing receiver
JPS6473950A (en) Telephone system
JPS61195053A (en) Voice switching circuit for loudspeaking telephone set
JPS5654130A (en) Suppression circuit for band limit noise
CA2026663A1 (en) Idle channel noise reduction in a line card having a dsp equalizer
JPH01123556A (en) Voice dialing device
JPH10336314A (en) Method and device for detecting tone like dtmf and telephone system including the detector

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A2

Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BY BZ CA CH CN CO CR CU CZ DE DK DM DZ EC EE ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NO NZ PH PL PT RO RU SD SE SG SI SK SL TJ TM TR TT TZ UA UG UZ VN YU ZA ZW

AL Designated countries for regional patents

Kind code of ref document: A2

Designated state(s): GH GM KE LS MW MZ SD SL SZ TZ UG ZW AM AZ BY KG KZ MD RU TJ TM AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE TR BF BJ CF CG CI CM GA GN GQ GW ML MR NE SN TD TG

DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
WWE Wipo information: entry into national phase

Ref document number: 2422203

Country of ref document: CA

WWE Wipo information: entry into national phase

Ref document number: 333/MUMNP/2003

Country of ref document: IN

WWE Wipo information: entry into national phase

Ref document number: 2001970637

Country of ref document: EP

WWE Wipo information: entry into national phase

Ref document number: 018185797

Country of ref document: CN

WWP Wipo information: published in national office

Ref document number: 2001970637

Country of ref document: EP

REG Reference to national code

Ref country code: DE

Ref legal event code: 8642

NENP Non-entry into the national phase

Ref country code: JP

WWG Wipo information: grant in national office

Ref document number: 2001970637

Country of ref document: EP