1741642

Information

• Patent Grant
• 1741642

• References
• Source

• Patent Number

  1,741,642

• Date Filed

  Not available

• Date Issued

  Tuesday, December 31, 1929
  95 years ago

• CPC

  • B61L5/1809 - Daylight signals

• US Classifications

  • 340 - Communications: electrical
  • 116 - Signals and indicators
  • 246 - Railway switches and signals
  • 362 - Illumination