Hydrometer

Details Hydrometer Hydrometer

1996-03-22

1997-09-30

Davis, Antoine Duval

Measuring, testing, or signalling instruments

Measuring, regulating or indicating instrument, or casing

Weight, force or density

1004

Patent

active

D03842991

REFERENCES:
patent: 4080834 (1978-03-01), Beauchemin, Jr.
patent: 4708017 (1987-11-01), Kownurko

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