2920485

Information

• Patent Grant
• 2920485

• References
• Source

• Patent Number

  2,920,485

• Date Filed

  Not available

• Date Issued

  Tuesday, January 12, 1960
  65 years ago

• CPC

  • G01J5/62 - using means for chopping the light Compensation for background radiation of chopper element
  • Y10S246/01 - Radiant energy devices

• US Classifications

  • 374 - Thermal measuring and testing
  • 246 - Railway switches and signals
  • 250 - Radiant energy
  • 356 - Optics: measuring and testing