Fish sonar body

Details Fish sonar body Fish sonar body

1987-10-22

1989-02-21

Jordan, M.

Fishing, trapping, and vermin destroying

Fishing

Illuminated, e.g., luminous

43 171, A01K 9712

Patent

active

048053376

ABSTRACT:
A fish sonar buoy is stayed on the surface of the water apart from a boat or shore, ultrasonic signals is emitted from a transmitter-receiver in the water, ultrasonic echo signals in the water are converted to electric signals in the transmitter-receiver, the electric signals are taken in a control circuit during a desired time after ultrasonic signals are emitted from the transmitter-receiver, and thus, a school of fish in the desired position below the water level is detected by a signal information device.

REFERENCES:
patent: 3879697 (1975-04-01), Richard
patent: 3885338 (1975-05-01), York
patent: 4161077 (1979-07-01), Ciaccio et al.
patent: 4253165 (1981-02-01), Christiansen
patent: 4339888 (1982-07-01), Sheng-Jung
patent: 4384425 (1983-05-01), Lemans
patent: 4422258 (1983-12-01), Adams et al.
patent: 4437256 (1984-03-01), Kulak
patent: 4635391 (1987-01-01), Early

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