CA961416A - Capacitive keyboard electronics - Google Patents

Capacitive keyboard electronics

Info

Publication number: CA961416A
Authority: CA; Canada
Prior art keywords: capacitive keyboard; keyboard electronics; electronics; capacitive; keyboard
Prior art date: 1971-12-30
Legal status (The legal status 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 status listed.): Expired

Application number

CA159,468A

Other versions

CA159468S (en

Inventor

Charles C. Hanson

Merle E. Houdek

Joseph P.L. Ho

Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)

International Business Machines Corp

Original Assignee

International Business Machines 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.)

1971-12-30

Filing date

1972-12-20

Publication date

1975-01-21

1972-12-20 Application filed by International Business Machines Corp filed Critical International Business Machines Corp

1975-01-21 Application granted granted Critical

1975-01-21 Publication of CA961416A publication Critical patent/CA961416A/en

Status Expired legal-status Critical Current

Links

Classifications

- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M11/00—Coding in connection with keyboards or like devices, i.e. coding of the position of operated keys
- H03M11/22—Static coding

CA159,468A 1971-12-30 1972-12-20 Capacitive keyboard electronics Expired CA961416A (en)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
US21419671A	1971-12-30	1971-12-30

Publications (1)

Publication Number	Publication Date
CA961416A true CA961416A (en)	1975-01-21

Family

ID=22798165

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
CA159,468A Expired CA961416A (en)	1971-12-30	1972-12-20	Capacitive keyboard electronics

Country Status (7)

Country	Link
US (1)	US3715747A (en)
JP (1)	JPS5326775B2 (en)
CA (1)	CA961416A (en)
DE (1)	DE2262004C3 (en)
FR (1)	FR2170661A5 (en)
GB (1)	GB1372599A (en)
IT (1)	IT971581B (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
JPS4931232A (en) *	1972-07-21	1974-03-20
US3786497A (en) *	1972-07-31	1974-01-15	Ibm	Matrix keyboard method and apparatus
US3886539A (en) *	1972-12-26	1975-05-27	Gen Motors Corp	Domestic appliance control and display systems
US4005316A (en) *	1975-12-18	1977-01-25	United Technologies Corporation	Switching transient suppression circuit
JPS6113840Y2 (en) *	1980-07-21	1986-04-28
DE3108028C2 (en) *	1981-03-03	1983-11-17	Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung E.V., 8000 Muenchen	User-friendly function keyboard with full identification of the current key assignment
JPS5970909U (en) *	1982-11-04	1984-05-14	加藤発条株式会社	Clip with temporary fixing means

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US3292764A (en) *	1965-06-11	1966-12-20	Harris Intertype Corp	Typesetting systems

1971
- 1971-12-30 US US00214196A patent/US3715747A/en not_active Expired - Lifetime
1972
- 1972-12-04 GB GB5585272A patent/GB1372599A/en not_active Expired
- 1972-12-06 IT IT32532/72A patent/IT971581B/en active
- 1972-12-15 JP JP12540872A patent/JPS5326775B2/ja not_active Expired
- 1972-12-19 DE DE2262004A patent/DE2262004C3/en not_active Expired
- 1972-12-20 CA CA159,468A patent/CA961416A/en not_active Expired
- 1972-12-26 FR FR7247143A patent/FR2170661A5/fr not_active Expired

Also Published As

Publication number	Publication date
DE2262004B2 (en)	1980-09-11
GB1372599A (en)	1974-10-30
FR2170661A5 (en)	1973-09-14
US3715747A (en)	1973-02-06
DE2262004C3 (en)	1981-08-13
JPS4879528A (en)	1973-10-25
DE2262004A1 (en)	1973-07-12
JPS5326775B2 (en)	1978-08-04
IT971581B (en)	1974-05-10

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