2798961

Information

• Patent Grant
• 2798961

• References
• Source

• Patent Number

  2,798,961

• Date Filed

  Not available

• Date Issued

  Tuesday, July 9, 1957
  67 years ago

• CPC

  • G01J5/08 - Optical features
  • G01J5/0806 - using focussing or collimating elements
  • G01J5/0834 - using shutters or modulators
  • G01J5/0859 - using a sighting arrangement, or a camera for the same purpose
  • Y10S246/01 - Radiant energy devices

• US Classifications

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