3509322

Information

• Patent Grant
• 3509322

• References
• Source

• Patent Number

  3,509,322

• Date Filed

  Not available

• Date Issued

  Tuesday, April 28, 1970
  54 years ago

• CPC

  • H03K17/28 - Modifications for introducing a time delay before switching
  • G05B11/16 - Two-step controllers
  • G05D23/1913 - delivering a series of pulses
  • G05D23/24 - the sensing element having a resistance varying with temperature

• US Classifications

  • 219 - Electric heating
  • 361 - Electricity: electrical systems and devices