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2155449
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Information
Patent Grant
2155449
References
Source
Patent Number
2,155,449
Date Filed
Not available
Date Issued
Tuesday, April 25, 1939
85 years ago
CPC
G09F13/16 - Signs formed of or incorporating reflecting elements or surfaces
F21V9/16 - Selection of luminescent materials for screens
G09F13/14 - Arrangements of reflectors theron
H01J65/08 - Lamps in which a screen or coating is excited to luminesce by radioactive material located inside the vessel
US Classifications
040 - Card, picture, or sign exhibiting
250 - Radiant energy
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