Patent
1975-01-03
1977-02-08
Weldon, Ulysses
58 23R, 350160R, G04B 1930
Patent
active
040065855
ABSTRACT:
An electronic timepiece with a digital display device employing electrochromic materials, such as titanate and niobate, as an electro-optical element. An electrochromic material produces different states of coloration depending upon the polarity of voltage applied thereto for a remarkably long period, and with a minimum of power consumption, whereby the timepiece enjoys a minimization in its size, a long life for its battery, and a variable design in the display.
REFERENCES:
patent: 3626410 (1971-12-01), deKoster
patent: 3652149 (1972-03-01), Rogers
patent: 3712710 (1973-01-01), Castellion et al.
patent: 3802182 (1974-04-01), Fujita
patent: 3839856 (1974-10-01), Dargent
patent: 3839857 (1974-10-01), Berets et al.
patent: 3863436 (1975-02-01), Schwarzschild et al.
patent: R28199 (1974-10-01), Deb et al.
Kume Kazunari
Ohno Hideshi
Tamaru Munetaka
Watanabe Minoru
Citizen Watch Co. Ltd.
Weldon Ulysses
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