Measuring – testing – or signalling instruments – Measuring – regulating or indicating instrument – or casing – Geometric
Patent
1992-06-03
1993-11-30
Douglas, Alan P.
Measuring, testing, or signalling instruments
Measuring, regulating or indicating instrument, or casing
Geometric
Patent
active
D03417867
REFERENCES:
patent: 5163228 (1992-11-01), Edwards et al.
Activator Methods, Inc.
Davis A. D.
Douglas Alan P.
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