Measuring – testing – or signalling instruments – Measuring – regulating or indicating instrument – or casing – Food preparation type
Patent
1977-10-31
1980-05-27
Holtje, Nelson C.
Measuring, testing, or signalling instruments
Measuring, regulating or indicating instrument, or casing
Food preparation type
D1005
Patent
active
D02551020
REFERENCES:
patent: D138360 (1944-07-01), Sanders
patent: D217180 (1970-04-01), Holland
patent: D218773 (1970-09-01), Sitts
patent: D241597 (1976-09-01), Confer
patent: 3458656 (1969-07-01), Sewerin
Dawe Digest, vol. 13, #2, Jun. 1970, p. 8, Ultrasonic Leak Detector.
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