Measuring – testing – or signalling instruments – Measuring – regulating or indicating instrument – or casing – Volume – flow or rate
Patent
1975-10-03
1978-09-05
Holtje, Nelson C.
Measuring, testing, or signalling instruments
Measuring, regulating or indicating instrument, or casing
Volume, flow or rate
D10 46, D10102, D12 70, D12192, D1004
Patent
active
D02492474
REFERENCES:
patent: D199808 (1964-12-01), Gazzam
patent: D235862 (1975-07-01), Miller
patent: D240512 (1976-07-01), Erisman
patent: 1715502 (1929-06-01), Huggins
Popular Science, 11/75, p. 86, Digital Tachometer.
Bungay Michael
Hepplewhite John
Shotz Frederic G.
Holtje Nelson C.
Lazaroff Joseph L.
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