1804666

Information

• Patent Grant
• 1804666

• References
• Source

• Patent Number

  1,804,666

• Date Filed

  Not available

• Date Issued

  Tuesday, May 12, 1931
  93 years ago

• CPC

  • B61L1/182 - Use of current of indifferent sort or a combination of different current types
  • Y10T307/937 - Switch actuation

• US Classifications

  • 246 - Railway switches and signals
  • 307 - Electrical transmission or interconnection systems