Measuring – testing – or signalling instruments – Measuring – regulating or indicating instrument – or casing – Geometric
Patent
1981-06-29
1983-07-05
Holtje, Nelson C.
Measuring, testing, or signalling instruments
Measuring, regulating or indicating instrument, or casing
Geometric
D11181, D1006
Patent
active
D02695987
REFERENCES:
patent: 359589 (1887-03-01), Bowen
patent: 611233 (1898-09-01), Brown
patent: 1568596, Frost
patent: 2349110 (1944-05-01), Potstada
patent: 4050404 (1977-09-01), McMackin
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