PH meter

Details PH meter PH meter

1987-09-16

1990-08-14

Holtje, Nelson C.

Measuring, testing, or signalling instruments

Measuring, regulating or indicating instrument, or casing

Chemical

Patent

active

D03098672

REFERENCES:
patent: 3294662 (1966-12-01), Matlow
patent: 4154659 (1979-05-01), Zetter
patent: 4461998 (1984-07-01), Kater
patent: 4490235 (1984-12-01), Calzi
Transeat, pH/mV/Temperature Meter, 1986, p. 373, found in (A.U. 293) Ex. Davis Library.

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