374871

Information

• Patent Grant
• 374871

• References
• Source

• Patent Number

  374,871

• Date Filed

  Not available

• Date Issued

  Tuesday, December 13, 1887
  137 years ago

• CPC

  • H02P7/063 - using centrifugal devices
  • Y10S388/928 - Which controls position of commutator brushes

• US Classifications

  • 388 - Electricity: motor control systems
  • 318 - Electricity: motive power systems
  • 338 - Electrical resistors
  • 361 - Electricity: electrical systems and devices