3708231

Information

• Patent Grant
• 3708231

• References
• Source

• Patent Number

  3,708,231

• Date Filed

  Not available

• Date Issued

  Tuesday, January 2, 1973
  52 years ago

• CPC

  • G01D5/30 - the beams of light being detected by photocells
  • G01C9/04 - Transmission means between sensing element and final indicator for giving an enlarged reading

• US Classifications

  • 356 - Optics: measuring and testing
  • 250 - Radiant energy