1487294

Information

• Patent Grant
• 1487294

• References
• Source

• Patent Number

  1,487,294

• Date Filed

  Not available

• Date Issued

  Tuesday, March 18, 1924
  101 years ago

• CPC

  • H02H7/266 - involving switching on a spare supply

• US Classifications

  • 361 - Electricity: electrical systems and devices