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VARIABLE LIGHT-FILTERING DEVICE
US 3,443,859 A
Filed
: 03/09/1964
Issued
: 05/13/1969
Est. Priority Date
: 03/09/1964
Status: Expired due to Term
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Current Assignee
Howard G. Rogers
Original Assignee
Howard G. Rogers
Inventors
Rogers, Howard G.
Application Number
US04/350,251
Time in Patent Office
1,891 Days
Field of Search
US Class Current
359/275
CPC Class Codes
F21S 41/125
Coloured light
F21S 41/645
by electro-optic means, e.g...
F21V 9/40
with provision for controll...
G02B 5/24
Liquid filters G02B5/23 tak...
G02F 1/15
based on an electrochromic ...
G02F 1/1503
caused by oxidation-reducti...
G03G 17/04
using photoelectrophoresis
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