1408040

Information

• Patent Grant
• 1408040

• References
• Source

• Patent Number

  1,408,040

• Date Filed

  Not available

• Date Issued

  Tuesday, February 28, 1922
  103 years ago

• CPC

  • H02P25/186 - whereby the speed is regulated by using a periodic interrupter

• US Classifications

  • 307 - Electrical transmission or interconnection systems
  • 323 - Electricity: power supply or regulation systems
  • 388 - Electricity: motor control systems