1387898

Information

• Patent Grant
• 1387898

• References
• Source

• Patent Number

  1,387,898

• Date Filed

  Not available

• Date Issued

  Tuesday, August 16, 1921
  103 years ago

• CPC

  • G02C1/026 - with auxiliary bars
  • G02C5/128 - Pince-nez

• US Classifications

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