Measuring – testing – or signalling instruments – Measuring – regulating or indicating instrument – or casing – Volume – flow or rate
Patent
1985-11-06
1988-09-20
Holtje, Nelson C.
Measuring, testing, or signalling instruments
Measuring, regulating or indicating instrument, or casing
Volume, flow or rate
Patent
active
D02977168
REFERENCES:
patent: D195226 (1963-05-01), Busillo
patent: D256000 (1980-07-01), Moljin
patent: 828108 (1906-08-01), Graham
patent: 1631746 (1927-06-01), Luckey
patent: 2970561 (1961-02-01), Ashwood
patent: 3152475 (1964-10-01), Ford
patent: 3585963 (1971-06-01), Hiszpansky
patent: 3805611 (1974-04-01), Hedland
patent: 4373528 (1983-02-01), Harle
patent: 4619139 (1986-10-01), Rosaen
New Equip. Digest-1/78-p. 46-Flowmeters at center.
Hedland Products brochure-1/80, pp. 1-3-Flowmeters.
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