Photometer

Details Photometer Photometer

1981-05-07

1983-06-21

Holtje, Nelson C.

Measuring, testing, or signalling instruments

Measuring, regulating or indicating instrument, or casing

Chemical

D1004

Patent

active

D02694166

REFERENCES:
patent: D180294 (1957-05-01), Petterson
patent: D251775 (1979-05-01), Schmidt
patent: D256341 (1980-08-01), Haunold
patent: D258273 (1981-02-01), Collister
patent: D261033 (1981-09-01), Armbruster
patent: D261623 (1981-11-01), Collister
patent: 3565535 (1971-02-01), Monell

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