1419725

Information

• Patent Grant
• 1419725

• References
• Source

• Patent Number

  1,419,725

• Date Filed

  Not available

• Date Issued

  Tuesday, June 13, 1922
  102 years ago

• CPC

  • G01J5/54 - Optical features

• US Classifications

  • 356 - Optics: measuring and testing
  • 359 - Optical: systems and elements