Liquid level detector

Details Liquid level detector Liquid level detector

1988-03-10

1990-11-20

Holtje, Nelson C.

Measuring, testing, or signalling instruments

Measuring, regulating or indicating instrument, or casing

Volume, flow or rate

D10102

Patent

active

D03122190

REFERENCES:
patent: D54584 (1920-03-01), Blood
patent: D218707 (1970-09-01), DiPinto
patent: D293558 (1988-01-01), Andreasson
patent: 4638666 (1987-01-01), Wong et al.

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