777489

Information

• Patent Grant
• 777489

• References
• Source

• Patent Number

  777,489

• Date Filed

  Not available

• Date Issued

  Tuesday, December 13, 1904
  120 years ago

• CPC

  • H02P7/063 - using centrifugal devices
  • Y10S388/927 - Which varies resistance of motor circuit

• US Classifications

  • 388 - Electricity: motor control systems
  • 188 - Brakes
  • 338 - Electrical resistors