3720866

Information

• Patent Grant
• 3720866

• References
• Source

• Patent Number

  3,720,866

• Date Filed

  Not available

• Date Issued

  Tuesday, March 13, 1973
  51 years ago

• CPC

  • G08C19/48 - being the type with a three-phase stator and a rotor fed by constant-frequency ac

• US Classifications

  • 318 - Electricity: motive power systems
  • 702 - Data processing: measuring, calibrating, or testing