2122818

Information

• Patent Grant
• 2122818

• References
• Source

• Patent Number

  2,122,818

• Date Filed

  Not available

• Date Issued

  Tuesday, July 5, 1938
  86 years ago

• CPC

  • G01G13/32 - involving photoelectric devices
  • G01N3/06 - Special adaptations of indicating or recording means

• US Classifications

  • 033 - Geometrical instruments
  • 073 - Measuring and testing
  • 250 - Radiant energy