2356912

Information

• Patent Grant
• 2356912

• References
• Source

• Patent Number

  2,356,912

• Date Filed

  Not available

• Date Issued

  Tuesday, August 29, 1944
  80 years ago

• CPC

  • G04D3/0007 - for springs
  • B21F3/04 - externally on a mandrel or the like
  • Y10T29/53626 - Flat spiral spring [e.g., watch or clock type]

• US Classifications

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