3821594

Information

• Patent Grant
• 3821594

• References
• Source

• Patent Number

  3,821,594

• Date Filed

  Not available

• Date Issued

  Friday, June 28, 1974
  50 years ago

• CPC

  • H01H43/308 - based on the change of electrical properties
  • H05B6/68 - for monitoring or control

• US Classifications

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