1209915

Information

• Patent Grant
• 1209915

• References
• Source

• Patent Number

  1,209,915

• Date Filed

  Not available

• Date Issued

  Tuesday, December 26, 1916
  107 years ago

• CPC

  • G01J5/56 - Electrical features

• US Classifications

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