Measuring – testing – or signalling instruments – Measuring – regulating or indicating instrument – or casing – Volume – flow or rate
Patent
1992-06-17
1994-01-11
Douglas, Alan P.
Measuring, testing, or signalling instruments
Measuring, regulating or indicating instrument, or casing
Volume, flow or rate
D10 96, D10100
Patent
active
D03431339
REFERENCES:
patent: D293557 (1988-01-01), Bartholoman et al.
patent: D331200 (1992-11-01), Garcia-Victoria
patent: 3358921 (1967-12-01), Berch et al.
patent: 3434659 (1969-03-01), Ham et al.
patent: 3437269 (1969-04-01), Sundblom
patent: 4531051 (1985-07-01), Sagmuller
Davis Antoine D.
Douglas Alan P.
Smith Hugh E.
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