Measuring – testing – or signalling instruments – Measuring – regulating or indicating instrument – or casing – Geometric
Patent
1987-04-03
1990-10-02
Holtje, Nelson C.
Measuring, testing, or signalling instruments
Measuring, regulating or indicating instrument, or casing
Geometric
Patent
active
D03109712
REFERENCES:
patent: D279798 (1985-07-01), Mori
patent: 573973 (1896-12-01), Harris et al.
patent: 1660624 (1928-02-01), Musham
patent: 2415926 (1947-02-01), Wilt
patent: 2915825 (1959-12-01), Robert
Davis Antoine D.
Holtje Nelson C.
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