MICROPHONE AMPLIFIER DETECTOR
Assignee
GERIG, JOHN S.
Filed
Aug 25, 1967
Granted
Jun 11, 1991
Location
11406 FIELDSTONE LANE, RESTON VIRGINIA 22091
Abstract
A device for detecting a covert transmitter having a time varying impedance therein including a radio frequency transmitter and an audio frequency transmitter which are directed so as to illuminate a target area. The audio tone drives the active elements into a non-linear mode of operation to modulate the transmitted radio frequency. The re-radiated energy is detected by a further radio frequency receiver.
Source: Google Patents
35 USC §181 Secrecy Order
Imposed
Mar 12, 1982
Rescinded
May 4, 1990
Duration
8 years, 1 month
Record Details
- Patent number
- US 5023616
- Application
- 04665196
- Aerospace match
- Yes
- Dataset source
- 35 USC §181 SO records
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