1942298

Information

• Patent Grant
• 1942298

• References
• Source

• Patent Number

  1,942,298

• Date Filed

  Not available

• Date Issued

  Tuesday, January 2, 1934
  92 years ago

• CPC

  • G02C5/2227 - comprising a fixed hinge member and a coil spring
  • G02C3/003 - Arrangements for fitting and securing to the head in the position of use
  • G02C5/143 - having special ear pieces
  • G02C5/146 - having special front end
  • G02C2200/28 - Coil spring twisted upon actuation

• US Classifications

  • 351 - Optics: eye examining, vision testing and correcting
  • D16 - Photography and optical equipment