1704735

Information

• Patent Grant
• 1704735

• References
• Source

• Patent Number

  1,704,735

• Date Filed

  Not available

• Date Issued

  Tuesday, March 12, 1929
  96 years ago

• CPC

  • B61L23/161 - using current of indifferent sorte or a combination of different current types

• US Classifications

  • 246 - Railway switches and signals