3346938

Information

• Patent Grant
• 3346938

• References
• Source

• Patent Number

  3,346,938

• Date Filed

  Not available

• Date Issued

  Tuesday, October 17, 1967
  57 years ago

• CPC

  • G04D3/0007 - for springs
  • B21F3/00 - Coiling wire into particular forms
  • G04B1/145 - Composition and manufacture of the springs
  • Y10T29/49609 - Spring making
  • Y10T29/49996 - Successive distinct removal operations

• US Classifications

  • 148 - Metal treatment
  • 029 - Metal working
  • 072 - Metal deforming
  • 968 - Horology