Measuring – testing – or signalling instruments – Measuring – regulating or indicating instrument – or casing – Volume – flow or rate
Patent
1984-05-29
1987-03-10
Holtje, Nelson C.
Measuring, testing, or signalling instruments
Measuring, regulating or indicating instrument, or casing
Volume, flow or rate
D23 19
Patent
active
D02886731
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patent: 864579 (1907-08-01), Volz
patent: 869320 (1907-10-01), Merrill
patent: 979518 (1910-12-01), Larabee
patent: 2552552 (1951-05-01), Head
patent: 4151745 (1979-05-01), Cordy
Holtje Nelson C.
Precision Meters, Inc.
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