1296976

Information

• Patent Grant
• 1296976

• References
• Source

• Patent Number

  1,296,976

• Date Filed

  Not available

• Date Issued

  Tuesday, March 11, 1919
  106 years ago

• CPC

  • G05D23/306 - using semiconductor devices
  • H01H43/30 - with timing of actuation of contacts due to thermal action

• US Classifications

  • 361 - Electricity: electrical systems and devices
  • 062 - Refrigeration
  • 236 - Automatic temperature and humidity regulation
  • 251 - Valves and valve actuation
  • 307 - Electrical transmission or interconnection systems
  • 318 - Electricity: motive power systems