3913420

Information

• Patent Grant
• 3913420

• References
• Source

• Patent Number

  3,913,420

• Date Filed

  Not available

• Date Issued

  Tuesday, October 21, 1975
  49 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