PH meter

Details PH meter PH meter

1977-01-03

1979-02-20

Holtje, Nelson C.

Measuring, testing, or signalling instruments

Measuring, regulating or indicating instrument, or casing

Chemical

D10 46, D10 75, D10103, D24 17, D1004

Patent

active

D02511142

REFERENCES:
patent: D181743 (1957-12-01), Molloy
patent: D219998 (1971-02-01), Behnk
patent: 2764892 (1956-10-01), Rosenthal
patent: 3170111 (1965-02-01), Case

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