3670202

Information

• Patent Grant
• 3670202

• References
• Source

• Patent Number

  3,670,202

• Date Filed

  Not available

• Date Issued

  Tuesday, June 13, 1972
  53 years ago

• CPC

  • G01J1/32 - adapted for automatic variation of the measured or reference value
  • H05B39/042 - by measuring the incident light
  • H05B39/081 - by measuring the incident light
  • Y02B20/14 - Specially adapted circuits

• US Classifications

  • 315 - Electric lamp and discharge devices: systems
  • 250 - Radiant energy