Measuring – testing – or signalling instruments – Measuring – regulating or indicating instrument – or casing – Volume – flow or rate
Patent
1978-05-05
1980-07-01
Holtje, Nelson C.
Measuring, testing, or signalling instruments
Measuring, regulating or indicating instrument, or casing
Volume, flow or rate
D1004
Patent
active
D02556669
REFERENCES:
patent: 2075424 (1937-03-01), Bull
patent: 2889707 (1959-06-01), Snider
patent: 3796097 (1974-03-01), Ruskin
patent: 3955415 (1976-05-01), Sharon
patent: 4154101 (1979-05-01), Buchanan et al.
Buchanan Steven O.
Butts Robert W.
Dwyer Instruments, Inc.
Holtje Nelson C.
McWilliams Thomas F.
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