Measuring – testing – or signalling instruments – Measuring – regulating or indicating instrument – or casing – Geometric
Patent
1977-03-28
1978-12-26
Holtje, Nelson C.
Measuring, testing, or signalling instruments
Measuring, regulating or indicating instrument, or casing
Geometric
D1004
Patent
active
D02506378
REFERENCES:
patent: D162370 (1951-03-01), Baker
patent: D166506 (1952-04-01), Sprengnether
patent: D235524 (1975-06-01), Kooi et al.
patent: D235525 (1975-06-01), Kooi et al.
Holtje Nelson C.
Keuffel & Esser Company
White Lionel N.
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