1325161

Information

• Patent Grant
• 1325161

• References
• Source

• Patent Number

  1,325,161

• Date Filed

  Not available

• Date Issued

  Tuesday, December 16, 1919
  105 years ago

• CPC

  • G08B7/02 - using mechanical transmission

• US Classifications

  • 340 - Communications: electrical
  • 116 - Signals and indicators