2720577

Information

• Patent Grant
• 2720577

• References
• Source

• Patent Number

  2,720,577

• Date Filed

  Not available

• Date Issued

  Tuesday, October 11, 1955
  69 years ago

• CPC

  • B21J17/02 - electrically heated
  • H01F30/14 - for changing the number of phases

• US Classifications

  • 219 - Electric heating