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Sunglasses with aligned infra-red, photochromic and ultraviolet filters
US 3,269,267 A
Filed
: 11/19/1962
Issued
: 08/30/1966
Est. Priority Date
: 11/19/1962
Status: Expired due to Term
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Current Assignee
Appleton Papers Incorporated
(Oldapco PDC Corp.)
Original Assignee
Robert D. Collins
Inventors
Collins, Robert D.
Application Number
US04/238,344
Time in Patent Office
1,380 Days
Field of Search
US Class Current
351/44
CPC Class Codes
A61F 9/023
with variable transmission,...
A61N 5/06
using light
G02B 5/23
Photochromic filters
G02C 7/102
Photochromic filters
G03C 1/685
Compositions containing spi...
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