3504257

Information

• Patent Grant
• 3504257

• References
• Source

• Patent Number

  3,504,257

• Date Filed

  Not available

• Date Issued

  Tuesday, March 31, 1970
  54 years ago

• CPC

  • H02P7/281 - the DC motor being operated in four quadrants
  • H02P7/29 - using pulse modulation
  • H02P7/30 - using magnetic devices with controllable degree of saturation

• US Classifications

  • 318 - Electricity: motive power systems