Measuring – testing – or signalling instruments – Measuring – regulating or indicating instrument – or casing – Regulator or control
Patent
1984-06-27
1987-01-13
Holtje, Nelson C.
Measuring, testing, or signalling instruments
Measuring, regulating or indicating instrument, or casing
Regulator or control
Patent
active
D02877015
REFERENCES:
patent: D217101 (1970-04-01), Feldman
patent: D224147 (1972-07-01), Miller
patent: D248455 (1978-07-01), Cunnie
patent: D260004 (1981-07-01), Ohasi
patent: D271380 (1983-11-01), Zanazzo
patent: D271569 (1983-11-01), Lui
API Instruments Co. Bulletin #49-B-Mar. 1967, front cover-Temperature Controllers.
Holtje Nelson C.
Johnson, Jr. C. L.
Qualitrol Corporation
Rudy S. J.
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