1777651

Information

• Patent Grant
• 1777651

• References
• Source

• Patent Number

  1,777,651

• Date Filed

  Not available

• Date Issued

  Tuesday, October 7, 1930
  94 years ago

• CPC

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

• US Classifications

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