2186254

Information

• Patent Grant
• 2186254

• References
• Source

• Patent Number

  2,186,254

• Date Filed

  Not available

• Date Issued

  Tuesday, January 9, 1940
  85 years ago

• CPC

  • H02P1/38 - by pole-changing

• US Classifications

  • 318 - Electricity: motive power systems