Marine depth sounder

Details Marine depth sounder Marine depth sounder

1985-10-04

1988-07-19

Holtje, Nelson C.

Measuring, testing, or signalling instruments

Measuring, regulating or indicating instrument, or casing

Food preparation type

Patent

active

D02967677

REFERENCES:
patent: D262622 (1982-01-01), Beadle
patent: D276231 (1984-11-01), Frigard
patent: D282447 (1986-02-01), Woodhall
patent: D286533 (1986-11-01), Felix
patent: D289265 (1987-04-01), Wood
Popular Science--2/79--p. 94--Depth Finder.

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