Combined pocket watch and calculator

Details Combined pocket watch and calculator Combined pocket watch and calculator

1978-09-25

1981-05-05

Holtje, Nelson C.

Measuring, testing, or signalling instruments

Watch, wristwatch or case

Combined

D1002

Patent

active

D02591065

REFERENCES:
patent: D60532 (1922-03-01), Gruen
patent: D138444 (1944-08-01), Smoleroff
patent: D247701 (1978-04-01), Kwon
patent: 3738099 (1973-06-01), Tanaka
patent: 3928960 (1975-12-01), Reese
patent: 4041295 (1977-08-01), Ido
patent: 4062181 (1977-12-01), Zurcher
Jeweler's Circular Keystone -9/78-p. 122-Calander Watches.
European Jeweler (D. G.Z.)-11/77 p. 78-Calander Watch at top-right.
Form-8/11/76-p. 42-Watch at middle-left.

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