Combined photoelectric and contact digital tachometer

Details Combined photoelectric and contact digital tachometer Combined photoelectric and contact digital tachometer

1988-08-18

1991-06-11

Holtje, Nelson C.

Measuring, testing, or signalling instruments

Measuring, regulating or indicating instrument, or casing

Volume, flow or rate

Patent

active

D03174174

REFERENCES:
patent: D304306 (1989-10-01), Kagayama
patent: 4000465 (1976-12-01), Sugiyama
Cole-Parmer Instrument Co., Digital Tachometer, .COPYRGT.1984, front cover.
Shimpo, Shimpo Tachometers & Counters, .COPYRGT.1985, front cover.

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