Measuring – testing – or signalling instruments – Measuring – regulating or indicating instrument – or casing – Volume – flow or rate
Patent
1991-04-02
1993-04-20
Douglas, Alan P.
Measuring, testing, or signalling instruments
Measuring, regulating or indicating instrument, or casing
Volume, flow or rate
Patent
active
D03348962
REFERENCES:
patent: D214908 (1969-08-01), Donovan
patent: 3266664 (1966-08-01), Pearson et al.
Shimizu Norio
Ueda Hitoshi
Davis Antoine D.
Douglas Alan P.
Koyo Electronics Industries Co. Ltd.
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