1940411

Information

• Patent Grant
• 1940411

• References
• Source

• Patent Number

  1,940,411

• Date Filed

  Not available

• Date Issued

  Tuesday, December 19, 1933
  91 years ago

• CPC

  • G01R13/38 - using the steady or oscillatory displacement of a light beam by an electromechanical measuring system

• US Classifications

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