Thermochromic wrist thermometer

Details Thermochromic wrist thermometer Thermochromic wrist thermometer

1977-03-16

1979-06-19

Holtje, Nelson C.

Measuring, testing, or signalling instruments

Measuring, regulating or indicating instrument, or casing

Temperature, humidity, atmospheric condition

D10 31, D1004

Patent

active

D02521369

REFERENCES:
patent: D238661 (1976-02-01), Sagi
patent: D242604 (1976-12-01), VanKersen
patent: D242605 (1976-12-01), VanKersen
patent: 3175401 (1965-03-01), Geldmacher
patent: 3597976 (1971-08-01), Fryar

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