Measuring – testing – or signalling instruments – Measuring – regulating or indicating instrument – or casing – Chemical
Patent
1992-08-25
1994-07-12
Douglas, Alan P.
Measuring, testing, or signalling instruments
Measuring, regulating or indicating instrument, or casing
Chemical
Patent
active
D03486206
REFERENCES:
patent: D241634 (1976-09-01), Nickerson
patent: D280130 (1985-08-01), Harkins et al.
patent: D311875 (1990-11-01), Dykstra et al.
patent: 4675163 (1987-06-01), Mybeck
patent: 4965049 (1990-10-01), Lillig et al.
patent: 5240326 (1993-08-01), Evanson
Davis A. D.
Douglas Alan P.
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