2456441

Information

• Patent Grant
• 2456441

• References
• Source

• Patent Number

  2,456,441

• Date Filed

  Not available

• Date Issued

  Tuesday, December 14, 1948
  76 years ago

• CPC

  • H02P25/325 - whereby the speed is regulated by measuring the motor speed and comparing it with a given physical value
  • G04F5/10 - using electric or electronic resonators

• US Classifications

  • 318 - Electricity: motive power systems
  • 307 - Electrical transmission or interconnection systems
  • 331 - Oscillators
  • 968 - Horology