Measuring – testing – or signalling instruments – Measuring – regulating or indicating instrument – or casing – Geometric
Patent
1990-07-19
1993-01-26
Douglas, Alan P.
Measuring, testing, or signalling instruments
Measuring, regulating or indicating instrument, or casing
Geometric
Patent
active
D03327540
REFERENCES:
patent: D305202 (1989-12-01), Johnson
patent: D310772 (1990-09-01), Johnson
patent: 2013850 (1935-09-01), Macischal
patent: 2634503 (1953-04-01), Richardson
patent: 2807888 (1957-10-01), Thomas
patent: 3728796 (1973-04-01), Lobaugh
Northern Robert
Weldy Philip D.
Davis Antoine D.
Dodd Thomas J.
Douglas Alan P.
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