KEY TRONIC CORPORATION A CORP. OF WA.

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5982357 Computer keyboard systems and methods for determining excessive key stroke forceExpiredMar 12, 97Nov 09, 99[G09G]
5879088 Computer keyboard with adjustable force keystroke feature using air pressureExpiredNov 24, 97Mar 09, 99[B41J, H01H]
5743384 Self-leveling key switchExpiredMay 09, 97Apr 28, 98[H01H]
5684279 Computer keyboard with improved membrane keyswitch structure having deflection concentration featureExpiredSep 12, 95Nov 04, 97[H01H]
5481074 Computer keyboard with cantilever switch and actuator designExpiredJun 18, 93Jan 02, 96[H01H]
5455556 Single station cursor device suitable for keyboardsExpiredAug 20, 91Oct 03, 95[H01C]
5438177 Two-layer membrane switchExpiredMay 06, 92Aug 01, 95[H01H]
5430263 Computer keyboard with integral dome sheet and support pegsExpiredJun 29, 94Jul 04, 95[H01H]
5422447 Keyboard with full-travel, self-leveling keyswitches and return mechanism keyswitchExpiredApr 14, 94Jun 06, 95[B41J, H01H]
D354484 Computer mouseExpiredAug 12, 93Jan 17, 95[]
5376765 Key leveler apparatusExpiredFeb 08, 94Dec 27, 94[H01H]
5360955 Computer keyboard with cantilever switch design and improved PCB/switch membrane interfaceExpiredAug 18, 92Nov 01, 94[H01H]
5358344 Keyboard with full-travel, self-leveling keyswitchesExpiredJul 15, 93Oct 25, 94[B41J]
5335137 Computer keyboard with electrostatic discharge featureExpiredJul 29, 92Aug 02, 94[H05F]
5329079 Computer keyboard with improved cantilever switch designExpiredFeb 12, 93Jul 12, 94[H01H]
5305238 Data input monitor and indicator for managing work pace and rest periodsExpiredNov 03, 92Apr 19, 94[B41J]
5298706 Membrane computer keyboard and improved key structureExpiredAug 13, 92Mar 29, 94[H01H]
5278557 Cursor movement control key and electronic computer keyboard for computers having a video displayExpiredFeb 19, 91Jan 11, 94[H03M]
5212356 Computer keyboard with flexible dome switch layerExpiredAug 14, 92May 18, 93[H01H]
5117076 Quieting device for keytop leveling mechanismsExpiredSep 22, 89May 26, 92[H01H]

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