3736431

Information

• Patent Grant
• 3736431

• References
• Source

• Patent Number

  3,736,431

• Date Filed

  Not available

• Date Issued

  Tuesday, May 29, 1973
  50 years ago

• CPC

  • G01N21/255 - Details
  • G01J1/10 - by comparison with reference light or electric value provisionally void
  • G01J1/1626 - Arrangements with two photodetectors, the signals of which are compared

• US Classifications

  • 250 - Radiant energy
  • 340 - Communications: electrical
  • 356 - Optics: measuring and testing