1889457

Information

• Patent Grant
• 1889457

• References
• Source

• Patent Number

  1,889,457

• Date Filed

  Not available

• Date Issued

  Tuesday, November 29, 1932
  92 years ago

• CPC

  • B61L7/085 - Common line wire control using synchronous distributors

• US Classifications

  • 246 - Railway switches and signals