Frequency sensor
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United States of America Patent
Stats
-
Jun 25, 1991
Grant Date -
N/A
app pub date -
Jun 27, 1989
filing date -
Jul 6, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A small-sized thin frequency sensor developed for prevention of theft of an article. The frequency sensor comprises a receiving antenna portion to receive high frequency waves, and a transmitting antenna portion which is shaped into a closed loop with a diode incorporated therein and is disposed linearly to the receiving antenna portion to form an oblong rectangular contour as a whole.
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