Measuring – testing – or signalling instruments – Measuring – regulating or indicating instrument – or casing – Geometric
Patent
1993-05-10
1994-12-20
Douglas, Alan P.
Measuring, testing, or signalling instruments
Measuring, regulating or indicating instrument, or casing
Geometric
Patent
active
D03535460
REFERENCES:
patent: D257962 (1981-01-01), Youdelman et al.
patent: 2452417 (1948-10-01), Zentis
patent: 3045906 (1962-07-01), Burg
patent: 3441208 (1969-04-01), Goldstein
patent: 4189634 (1980-02-01), Labove et al.
Woman's Day; Master Shopper; Aug. 1971; p. 150.
Davis Antoine D.
Douglas Alan P.
Marrs Roger A.
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