Portable radio frequency emitting identifier
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
May 17, 1983
Grant Date -
N/A
app pub date -
Dec 31, 1980
filing date -
Dec 31, 1980
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An automatic identification system wherein a portable identifier, preferably shaped like a credit card, incorporates an oscillator and encoder so as to generate a programmable pulse position-modulated signal in the radio frequency range for identification of the user. The identifier can be made to generate the identification signal constantly or can be made for stimulated transmission responsive to an interrogation signal. The identification signal can be preset or can be programmable by use of a programmable memory.
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