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2499181
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Information
Patent Grant
2499181
References
Source
Patent Number
2,499,181
Date Filed
Not available
Date Issued
Tuesday, February 28, 1950
74 years ago
CPC
H04N3/405 - with film moving only during the field blanking interval
G03B21/2026 - Gas discharge type light sources
G03B21/2053 - Intensity control of illuminating light
G03B21/32 - Details specially adapted for motion-picture projection
US Classifications
348 - Television
352 - Optics: motion pictures
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