3833808

Information

• Patent Grant
• 3833808

• References
• Source

• Patent Number

  3,833,808

• Date Filed

  Not available

• Date Issued

  Tuesday, September 3, 1974
  50 years ago

• CPC

  • G01D5/30 - the beams of light being detected by photocells
  • G01L9/0032 - using photoelectric means
  • G01R17/04 - in which the reference value is continuously or periodically swept over the range of values to be measured

• US Classifications

  • 250 - Radiant energy