Measuring – testing – or signalling instruments – Measuring – regulating or indicating instrument – or casing – Geometric
Patent
1991-08-12
1993-06-15
Douglas, Alan P.
Measuring, testing, or signalling instruments
Measuring, regulating or indicating instrument, or casing
Geometric
Patent
active
D03364437
REFERENCES:
patent: D249128 (1978-08-01), Stookey
patent: D256340 (1980-08-01), Spohn, Jr.
patent: 1572237 (1926-02-01), Hunt
patent: 2621409 (1952-12-01), Dvorak
Davis Antoine D.
Douglas Alan P.
Harrison John M.
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