Aquarium pump indicator

Details Aquarium pump indicator Aquarium pump indicator

1994-08-03

1995-10-03

Seifert, Ralf

Measuring, testing, or signalling instruments

Measuring, regulating or indicating instrument, or casing

Chemical

Patent

active

D03628132

REFERENCES:
patent: D184953 (1959-04-01), Morphis
patent: D247821 (1978-05-01), Biersch et al.
patent: D256567 (1980-08-01), Voss et al.
patent: D306449 (1990-03-01), Shannon
patent: D312421 (1990-11-01), Trottmann
patent: D329617 (1992-09-01), Tinz
patent: D336861 (1993-06-01), Nicholas
patent: 4922226 (1990-05-01), Hsieh et al.

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