Combined marine knotmeter, log and depth sounder

Details Combined marine knotmeter, log and depth sounder Combined marine knotmeter, log and depth sounder

1982-01-26

1984-04-24

Holtje, Nelson C.

Measuring, testing, or signalling instruments

Measuring, regulating or indicating instrument, or casing

Volume, flow or rate

Patent

active

D02735717

REFERENCES:
patent: D232221 (1974-07-01), Fujiani
patent: D249247 (1978-09-01), Shotz
patent: D265298 (1982-07-01), Salisbury
patent: 2211118 (1940-08-01), Hills
patent: 2287554 (1942-06-01), Hanson
patent: 3126738 (1964-03-01), Taylor
patent: 3321969 (1967-05-01), Spencer
patent: 3364739 (1968-01-01), Foster
patent: 3908456 (1975-09-01), Riggs
patent: 4176546 (1979-12-01), Gibson
Goldbergs' Marine Discount Accessory Cat., 1978, p. 136, Knotmeters at top-left & bottom-right.
Sailboat Equipment Directory, p. 87, Knotmeters at top-right.

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