1529151

Information

• Patent Grant
• 1529151

• References
• Source

• Patent Number

  1,529,151

• Date Filed

  Not available

• Date Issued

  Tuesday, March 10, 1925
  100 years ago

• CPC

  • H04Q1/48 - Induced-current signalling arrangements

• US Classifications

  • 379 - Telephonic communications
  • 246 - Railway switches and signals