Marine depth sounder

Details Marine depth sounder Marine depth sounder

1984-10-03

1987-04-14

Holtje, Nelson C.

Measuring, testing, or signalling instruments

Measuring, regulating or indicating instrument, or casing

Food preparation type

D10 70

Patent

active

D02892650

REFERENCES:
patent: D191581 (1961-10-01), Scharfenburg
patent: D242722 (1976-12-01), Bell
patent: D264128 (1982-04-01), Barnes
patent: D265384 (1982-07-01), Kay
patent: D281309 (1985-11-01), Highstreet
patent: D282447 (1986-02-01), Woodhall
patent: D286384 (1986-10-01), Grilk
Popular Science-2/79-p. 94-Depth Finder at right.
Popular Science-2/79-p. 96-Depth Finders at top-left.

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