Measuring – testing – or signalling instruments – Measuring – regulating or indicating instrument – or casing – Geometric
Patent
1991-11-22
1993-09-07
Douglas, Alan P.
Measuring, testing, or signalling instruments
Measuring, regulating or indicating instrument, or casing
Geometric
D10 69
Patent
active
D03390748
REFERENCES:
patent: 2933679 (1960-04-01), Bray
patent: 4310797 (1982-01-01), Butler
patent: 4944096 (1990-07-01), Tolley
Davis Antoine D.
Douglas Alan P.
Johnson Level & Tool Mfg. Co.
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