1810220

Information

• Patent Grant
• 1810220

• References
• Source

• Patent Number

  1,810,220

• Date Filed

  Not available

• Date Issued

  Tuesday, June 16, 1931
  94 years ago

• CPC

  • G02C5/00 - Construction of non-optical parts
  • G02C5/143 - having special ear pieces
  • G02C2200/10 - Frame or frame portions made from wire
  • Y10T24/3797 - with permanently deformed mounting structure

• US Classifications

  • 351 - Optics: eye examining, vision testing and correcting
  • 024 - Buckles, buttons, clasps, etc.