Miniature gem weighing scale

Details Miniature gem weighing scale Miniature gem weighing scale

1990-10-12

1992-09-15

Walsh, Donald P.

Measuring, testing, or signalling instruments

Measuring, regulating or indicating instrument, or casing

Weight, force or density

D10 89

Patent

active

D03293920

REFERENCES:
patent: D281586 (1985-12-01), Chandler
patent: D303358 (1989-09-01), Bosse
patent: D308345 (1990-06-01), Nakagawa et al.
patent: 3968849 (1976-07-01), Dale et al.
patent: 4744428 (1988-05-01), Knotter et al.
patent: 4800973 (1989-01-01), Angel

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