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1558504
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Information
Patent Grant
1558504
References
Source
Patent Number
1,558,504
Date Filed
Not available
Date Issued
Tuesday, October 27, 1925
99 years ago
CPC
G06K1/00 - Methods or arrangements for marking the record carrier in digital fashion
G10G3/02 - using mechanical means only
US Classifications
234 - Selective cutting
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