Informational sport clock

Details Informational sport clock Informational sport clock

1989-12-07

1992-04-14

Holtje, Nelson C.

Measuring, testing, or signalling instruments

Clock or clock case

Simulative

D10 33

Patent

active

D03253490

REFERENCES:
patent: D125299 (1941-02-01), Wayman
patent: D221463 (1971-08-01), Polisky
patent: D274133 (1984-06-01), Dillon
patent: D274986 (1984-08-01), Mermelstein
patent: 4505597 (1985-03-01), Flinn
Premium Practice--Aug. 1967--p. 79--"Ball" clocks at top.
European Jeweler--Apr. 1982--p. 165--Ball Clocks--at bottom.
Jeweler's Circular-Keystone--May 1965--p. 4--clock.

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