3689798

Information

• Patent Grant
• 3689798

• References
• Source

• Patent Number

  3,689,798

• Date Filed

  Not available

• Date Issued

  Tuesday, September 5, 1972
  52 years ago

• CPC

  • H01J37/242 - Filament heating power supply or regulation circuits
  • G05F1/44 - semiconductor devices only

• US Classifications

  • 315 - Electric lamp and discharge devices: systems
  • 219 - Electric heating