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Browse by Category: Main > Information Technology
Class Information
Number: 341/25
Name: Coded data generation or conversion > Bodily actuated code generator > Including keyboard or keypad > With error prevention means (e.g., debounce, antichatter) > With rollover feature (i.e., antidoublestrike)
Description: Subject matter which compensates for simultaneous actuation of plural control elements.










Patents under this class:
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Patent Number Title Of Patent Date Issued
8446299 Method and device for encoding and decoding of data in unique number values May. 21, 2013
8442578 Mobile personal services platform for providing feedback May. 14, 2013
8350730 Keyboard scan Jan. 8, 2013
8350733 Keyboard scan for human interface devices Jan. 8, 2013
8339292 Key operation device and mobile terminal device Dec. 25, 2012
8274408 USB keyboard arrangement having N-keys rollover and the method thereof Sep. 25, 2012
8274410 Data input interface and method for inputting data Sep. 25, 2012
7453376 Method, apparatus, and computer-readable medium for key press determination Nov. 18, 2008
7386882 Key pad decoder Jun. 10, 2008
7167107 Keypad array having reduced number of input/outputs and method for generating same Jan. 23, 2007
7056043 Keyboard for a mobile device Jun. 6, 2006
6985080 Flame sense circuit and method with analog output Jan. 10, 2006
6833825 Apparatus for remotely controlling a digital processing system Dec. 21, 2004
6705783 Ruggedized keyboard with cursor positioning device Mar. 16, 2004
6417787 Method and apparatus for increasing the number of keys of a key-matrix Jul. 9, 2002
6198475 Touch operation information output device Mar. 6, 2001
6104318 Method for entering a special mode of an electric device Aug. 15, 2000
5689247 Automated system for identifying authorized system users Nov. 18, 1997
5583498 Input device Dec. 10, 1996
5552781 Fault tolerant method of decoding an electronic key system Sep. 3, 1996
5539400 Ultra-low power, scan on demand keypad encoder Jul. 23, 1996
5523755 N-key rollover keyboard without diodes Jun. 4, 1996
5486824 Data processor with a hardware keyscan circuit, hardware keyscan circuit, and method therefor Jan. 23, 1996
5448236 N-key rollover circuit Sep. 5, 1995
5424730 Method and apparatus for differentiating simultaneous and sequential key strokes Jun. 13, 1995
5371498 Circuit for recognizing key inputs Dec. 6, 1994
5264845 Key scan circuit and method in a microcomputer system Nov. 23, 1993
5177330 Key board switch Jan. 5, 1993
5137383 Chinese and Roman alphabet keyboard arrangement Aug. 11, 1992
5059974 Method for determining phantom switch condition Oct. 22, 1991
5053585 Multipurpose keyboard using digitizer pad featuring spatial minimization of a pressure contact area and method of making same Oct. 1, 1991
4994634 Sheet switch Feb. 19, 1991
4988997 Method for character code generation Jan. 29, 1991
4929944 Key input apparatus May. 29, 1990
4922248 Key output method for keyboards May. 1, 1990
4918444 Key-depression data input device Apr. 17, 1990
4878056 Key input circuit Oct. 31, 1989
4833447 Input device May. 23, 1989
4817010 Vending machine control with improved vendor selector switch detection and decoding apparatus Mar. 28, 1989
4794375 Keyboard crosspoint encoder having pseudo-n-key rollover Dec. 27, 1988
4739310 Keyboard control system Apr. 19, 1988
4728931 Charge redistribution capacitance detection apparatus Mar. 1, 1988
4713564 Bounce-nullifying switch unit Dec. 15, 1987
4709228 Electronic data input keyboard comprising keys provided with conductive contacts Nov. 24, 1987
4517553 N-Key rollover keyboard May. 14, 1985
4498073 Keyboard with simultaneous operations Feb. 5, 1985
4420744 Keyboard crosspoint encoder having N-key rollover Dec. 13, 1983
4359612 Universal keyboard and method of producing same Nov. 16, 1982
4359613 Molded keyboard and method of fabricating same Nov. 16, 1982
4278965 Photo-optical keyboard having n-key rollover Jul. 14, 1981

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