Dual display digital stop watch

Details Dual display digital stop watch Dual display digital stop watch

1987-08-03

1990-11-27

Dunkins, Bruce W.

Measuring, testing, or signalling instruments

Watch, wristwatch or case

Wrist type

Patent

active

D03124169

REFERENCES:
patent: D259626 (1981-06-01), Wada
patent: D296083 (1988-06-01), Morishima
patent: D297312 (1988-08-01), Ishizaka
patent: D300210 (1989-03-01), Houlihan
patent: D300514 (1989-04-01), Morishima
patent: D303768 (1989-10-01), Wakamatsu

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