3833794

Information

• Patent Grant
• 3833794

• References
• Source

• Patent Number

  3,833,794

• Date Filed

  Not available

• Date Issued

  Tuesday, September 3, 1974
  51 years ago

• CPC

  • H05B39/081 - by measuring the incident light
  • G03G15/2007 - using radiant heat
  • G05D23/1906 - using an analogue comparing device
  • G05D23/27 - with sensing element responsive to radiation

• US Classifications

  • 219 - Electric heating
  • 392 - Electric resistance heating devices