Measuring – testing – or signalling instruments – Measuring – regulating or indicating instrument – or casing – Geometric
Patent
1976-03-04
1977-07-12
Douglas, Alan P.
Measuring, testing, or signalling instruments
Measuring, regulating or indicating instrument, or casing
Geometric
D1004
Patent
active
D02449960
REFERENCES:
patent: 2664638 (1954-01-01), Storey
patent: 3045354 (1962-07-01), Frauenholtz
Douglas Alan P.
Hamilton E. R.
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