3721275

Information

• Patent Grant
• 3721275

• References
• Source

• Patent Number

  3,721,275

• Date Filed

  Not available

• Date Issued

  Tuesday, March 20, 1973
  52 years ago

• CPC

  • G02C13/001 - Assembling; Repairing
  • B21F45/002 - of frames for spectacles
  • G02C5/00 - Construction of non-optical parts
  • Y10T29/31 - Spectacle-frame making

• US Classifications

  • 140 - Wireworking
  • 029 - Metal working