1487680

Information

• Patent Grant
• 1487680

• References
• Source

• Patent Number

  1,487,680

• Date Filed

  Not available

• Date Issued

  Tuesday, March 18, 1924
  100 years ago

• CPC

  • H02P25/105 - Four quadrant control
  • Y10T307/544 - Circulating- or inter-current control or prevention
  • Y10T307/724 - Connecting or disconnecting

• US Classifications

  • 318 - Electricity: motive power systems
  • 307 - Electrical transmission or interconnection systems