3509357

Information

• Patent Grant
• 3509357

• References
• Source

• Patent Number

  3,509,357

• Date Filed

  Not available

• Date Issued

  Tuesday, April 28, 1970
  54 years ago

• CPC

  • H02J9/06 - with automatic change-over
  • H02H3/36 - involving comparison of the voltage or current values at corresponding points of different systems
  • H03K17/72 - having more than two PN junctions having more than three electrodes having more than one electrode connected to the same conductivity region
  • H03K17/725 - for ac voltages or currents
  • Y10T307/615 - Substitute or emergency source

• US Classifications

  • 307 - Electrical transmission or interconnection systems