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3509804
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Information
Patent Grant
3509804
References
Source
Patent Number
3,509,804
Date Filed
Not available
Date Issued
Tuesday, May 5, 1970
54 years ago
CPC
B41B17/08 - with a fixed carrier
B41B21/16 - Optical systems
US Classifications
396 - Photography
359 - Optical: systems and elements
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