Measuring – testing – or signalling instruments – Measuring – regulating or indicating instrument – or casing – Geometric
Patent
1974-08-13
1977-05-17
Holtje, Nelson C.
Measuring, testing, or signalling instruments
Measuring, regulating or indicating instrument, or casing
Geometric
D1004
Patent
active
D02443619
REFERENCES:
patent: D165965 (1952-02-01), Daniel
Bethel George F.
Holtje Nelson C.
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