VARIABLE FOCUSING SONAR
Assignee
Filed
Oct 22, 1968
Granted
Jul 3, 1990
Location
Abstract
The received signal from an acoustic echo detection and ranging system is mpared with internally generated signals indicating the focus of a variable focus transducer. Logic circuits in the signal comparison channel develop control voltages to focus said transducer upon a predetermined area from which said received signal originates.
Source: Google Patents
35 USC §181 Secrecy Order
Imposed
Jan 22, 1982
Rescinded
Feb 21, 1990
Duration
8 years, 1 month
Record Details
- Patent number
- US 4939697
- Application
- 04769759
- Aerospace match
- Yes
- Dataset source
- 35 USC §181 SO records
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