US PATENT SUBCLASS 714 / FOR 218
.~.~ Two key-down detector (371/59)

Current as of: June, 1999
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714 /   HD   ERROR DETECTION/CORRECTION AND FAULT DETECTION/RECOVERY

FOR 204  DF  ERROR/FAULT DETECTION TECHNIQUES (371/48) {6}
FOR 216  DF  .~ Forbidden combination or improper condition (371/57.1) {7}
FOR 218.~.~ Two key-down detector (371/59)

DEFINITION

Classification: 714/FOR.218

Two key-down detector:

Foreign art collections including subject matter in which the improper condition is the simultaneous activation of two or more keys on a data input device.