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US006720863B2
(12) United States Patent ao) Patent No.: us 6,720,863 B2
Hull et al. (45) Date of Patent: Apr. 13,2004
(54) MOBILE ELECTRONIC COMMUNICATION DEVICE WITH LIGHTS TO INDICATE RECEIVED MESSAGES
(75) Inventors: Eric J. Hull, Seattle, WA (US);
Jonathan O. Nelson, Kirkland, WA
(US); Gary N. Mager, Seattle, WA
(US)
(73) Assignee: Wildseed Ltd., Kirkland, WA (US)
( * ) Notice: Subject to any disclaimer, the term of this patent is extended or adjusted under 35 U.S.C. 154(b) by 254 days.
(21) Appl. No.: 09/931,788
(22) Filed: Aug. 16, 2001
(65) Prior Publication Data
US 2003/0034878 Al Feb. 20, 2003
(51) Int. C I. II04Q 1 00
(52) U.S. CI 340/7.51; 340/7.61; 379/162;
455/412.2
(58) Field of Search 340/7.51, 7.61;
379/162; 701/3; 345/751; 455/412.2, 403,
462, 566
(56) References Cited
U.S. PATENT DOCUMENTS
4,374,308 A * 2/1983 Holesha 379/162
4,975,694 A * 12/1990 McLaughlin et al 340/7.55
5,270,931 A * 12/1993 Appleford 701/3
5,546,078 A * 8/1996 Motohashi et al 340/7.61
5,553,125 A * 9/1996 Martensson 455/412.2
5,555,550 A * 9/1996 Kaschke 455/566
5,579,472 A * 11/1996 Keyworth et al 345/751
5,703,934 A * 12/1997 Zicker et al 455/462
5,748,106 A * 5/1998 Schoenian et al 340/7.55
5,793,304 A * 8/1998 Sone 340/7.55
5,946,636 A * 8/1999 Uyeno et al 455/566
6,430,405 Bl * 8/2002 Jambhekar et al 455/403
6,553,223 Bl * 4/2003 Bayley et al 455/419
* cited by examiner
Primary Examiner—Brian Zimmerman
(74) Attorney, Agent, or Firm—Schwabe, Williamson &
Wyatt, P.C.
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A mobile electronic communication device includes a processor unit, a transceiver, a keypad and a light unit. Each key of the keypad is associated with a contact of a contact list. The light unit can perform light functions to notify a user of the reception and/or status of messages received via the transceiver. The light functions include providing an indication of the age of a received message that was sent by a contact in the contacts list. The age of the message is indicated by a modulation of the illuminating light. In one embodiment, the age of a message is indicated as one of a set of predetermined age ranges, with each age range being represented by a unique color.
31 Claims, 8 Drawing Sheets