Measuring – testing – or signalling instruments – Measuring – regulating or indicating instrument – or casing – Geometric
Patent
1992-08-03
1993-12-14
Douglas, Alan P.
Measuring, testing, or signalling instruments
Measuring, regulating or indicating instrument, or casing
Geometric
Patent
active
D03422100
REFERENCES:
patent: D240608 (1976-07-01), Quenot
patent: D257008 (1980-09-01), Hildebrandt
patent: 4930227 (1990-06-01), Ketchpel
patent: 5062215 (1991-11-01), Schlitt
Keson, Powerglide One-Inch Wide Tape Blade, Aug. 1989, p. 8.
Christopher John S.
Davis Antoine D.
Douglas Alan P.
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