Measuring – testing – or signalling instruments – Measuring – regulating or indicating instrument – or casing – Volume – flow or rate
Patent
1988-04-20
1991-10-01
Holtje, Nelson C.
Measuring, testing, or signalling instruments
Measuring, regulating or indicating instrument, or casing
Volume, flow or rate
Patent
active
D03203620
REFERENCES:
patent: D83740 (1931-03-01), Mylius et al.
patent: D213466 (1969-03-01), Moran et al.
patent: D219792 (1971-01-01), Grosso
patent: 4163939 (1979-08-01), Halstead et al.
patent: 4491789 (1985-01-01), Benbow
Edwards Cree A.
Johnson Larsh M.
Davis Antoine D.
Domestic Automation Company Inc.
Holtje Nelson C.
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