1952890

Information

• Patent Grant
• 1952890

• References
• Source

• Patent Number

  1,952,890

• Date Filed

  Not available

• Date Issued

  Tuesday, March 27, 1934
  91 years ago

• CPC

  • G02C5/20 - adjustable
  • G02C5/16 - resilient or with resilient parts
  • G02C2200/10 - Frame or frame portions made from wire
  • G02C2200/28 - Coil spring twisted upon actuation
  • Y10T29/31 - Spectacle-frame making

• US Classifications

  • 351 - Optics: eye examining, vision testing and correcting
  • 029 - Metal working