2515689

Information

• Patent Grant
• 2515689

• References
• Source

• Patent Number

  2,515,689

• Date Filed

  Not available

• Date Issued

  Tuesday, July 18, 1950
  74 years ago

• CPC

  • G04D3/0041 - for coil-springs

• US Classifications

  • 072 - Metal deforming
  • 140 - Wireworking
  • 968 - Horology