Fish counter

Details Fish counter Fish counter

1987-08-13

1990-08-21

Holtje, Nelson C.

Measuring, testing, or signalling instruments

Measuring, regulating or indicating instrument, or casing

Volume, flow or rate

Patent

active

D03100464

REFERENCES:
patent: D184669 (1959-03-01), Dom
patent: D295836 (1988-05-01), Campbell
patent: D300610 (1989-04-01), Machida
patent: 2093308 (1937-09-01), Cook
patent: 2264797 (1941-12-01), Hathaway et al.
patent: 3000559 (1961-09-01), Dom
patent: 3777699 (1973-12-01), Pfleger
patent: 3936963 (1976-02-01), Chan

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