1438555

Information

• Patent Grant
• 1438555

• References
• Source

• Patent Number

  1,438,555

• Date Filed

  Not available

• Date Issued

  Tuesday, December 12, 1922
  103 years ago

• CPC

  • G08B5/32 - with indicator element moving rectilinearly

• US Classifications

  • 340 - Communications: electrical
  • 187 - Elevator, industrial lift truck, or stationary lift for vehicle