1491389

Information

• Patent Grant
• 1491389

• References
• Source

• Patent Number

  1,491,389

• Date Filed

  Not available

• Date Issued

  Tuesday, April 22, 1924
  100 years ago

• CPC

  • B23K3/0392 - the heat being generated by contact resistance

• US Classifications

  • 219 - Electric heating
  • 126 - Stoves and furnaces
  • D08 - Tools and hardware