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3913420
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Information
Patent Grant
3913420
References
Source
Patent Number
3,913,420
Date Filed
Not available
Date Issued
Tuesday, October 21, 1975
48 years ago
CPC
B21D31/02 - Stabbing or piercing
B21D28/10 - Incompletely punching in such a manner that the parts are still coherent with the work
B21K5/12 - other cutting tools
B23D73/04 - Methods or machines for the manufacture of files or rasps
US Classifications
076 - Metal tools and implements, making
072 - Metal deforming
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