Measuring – testing – or signalling instruments – Measuring – regulating or indicating instrument – or casing – Geometric
Patent
1980-08-25
1982-12-07
Spangler, Robert C.
Measuring, testing, or signalling instruments
Measuring, regulating or indicating instrument, or casing
Geometric
D1007
Patent
active
D02671557
REFERENCES:
patent: D118832 (1940-02-01), Opotow
patent: D182193 (1958-02-01), Minors
patent: 2293411 (1942-08-01), Spillman
patent: 2592877 (1952-04-01), Ellington
patent: 3826008 (1974-07-01), Nishina
Nardelli Dominick
Spangler Robert C.
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