3613420

Information

• Patent Grant
• 3613420

• References
• Source

• Patent Number

  3,613,420

• Date Filed

  Not available

• Date Issued

  Tuesday, October 19, 1971
  53 years ago

• CPC

  • G04D3/0007 - for springs
  • B21F1/00 - Bending wire other than coiling Straightening wire
  • B21F35/04 - Making flat springs

• US Classifications

  • 072 - Metal deforming
  • 968 - Horology