Measuring – testing – or signalling instruments – Measuring – regulating or indicating instrument – or casing – Geometric
Patent
1993-02-26
1994-07-26
Douglas, Alan P.
Measuring, testing, or signalling instruments
Measuring, regulating or indicating instrument, or casing
Geometric
Patent
active
D03490661
REFERENCES:
patent: D242437 (1976-11-01), Kramer
patent: 3191306 (1965-06-01), De Valera Kierans
patent: 4899453 (1990-02-01), Bhat et al.
Davis Antoine D.
Douglas Alan P.
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