1790218

Information

• Patent Grant
• 1790218

• References
• Source

• Patent Number

  1,790,218

• Date Filed

  Not available

• Date Issued

  Tuesday, January 27, 1931
  94 years ago

• CPC

  • G04D1/041 - for springs of driving mechanisms
  • B23P19/048 - Springs
  • Y10T29/53626 - Flat spiral spring [e.g., watch or clock type]

• US Classifications

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