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Decorative materials and devices having polarizing and birefringent layers
US 2,700,919 A
Filed
: 04/26/1951
Issued
: 02/01/1955
Est. Priority Date
: 04/26/1951
Status: Expired due to Term
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Current Assignee
Boone, Philip
Original Assignee
Boone, Philip
Inventors
Boone, Philip
Application Number
US03/223,107
Time in Patent Office
1,377 Days
Field of Search
US Class Current
359/489.19
CPC Class Codes
B44F 1/045
having mirrors or metallic ...
G02B 5/045
Prism arrays
G02B 5/28
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