Apparatus and method for security of electric and electronic devices
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United States of America Patent
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Jan 31, 1989
Issued Date -
N/A
app pub date -
Apr 26, 1988
filing date -
Nov 17, 1986
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An apparatus and method having elements and steps selected and arranged to require a timed, coded input for authenticating a code of characters in a set sequence for authorizing user access and having means for emitting a signal or alarm, wherein the system is initialized so as to require matching of representative signals at inhibiting control circuits having an on-state and an off-state so that characters entered sequentially in timed cycles are authenticated as a correct member of a code set in a correct time cycle or disqualified as an unauthentic character. An authentic character is a certain designated character entered in the selected time cycle.
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