2977999

Information

• Patent Grant
• 2977999

• References
• Source

• Patent Number

  2,977,999

• Date Filed

  Not available

• Date Issued

  Tuesday, April 4, 1961
  64 years ago

• CPC

  • B21F3/04 - externally on a mandrel or the like
  • B21F37/00 - Manufacture of rings from wire
  • B21F37/02 - of resilient rings

• US Classifications

  • 140 - Wireworking