2143992

Information

• Patent Grant
• 2143992

• References
• Source

• Patent Number

  2,143,992

• Date Filed

  Not available

• Date Issued

  Tuesday, January 17, 1939
  85 years ago

• CPC

  • B61L1/182 - Use of current of indifferent sort or a combination of different current types

• US Classifications

  • 361 - Electricity: electrical systems and devices