1560864

Information

• Patent Grant
• 1560864

• References
• Source

• Patent Number

  1,560,864

• Date Filed

  Not available

• Date Issued

  Tuesday, November 10, 1925
  99 years ago

• CPC

  • G01J5/56 - Electrical features

• US Classifications

  • 356 - Optics: measuring and testing
  • 315 - Electric lamp and discharge devices: systems