1880149

Information

• Patent Grant
• 1880149

• References
• Source

• Patent Number

  1,880,149

• Date Filed

  Not available

• Date Issued

  Tuesday, September 27, 1932
  92 years ago

• CPC

  • B61L13/005 - optically actuated

• US Classifications

  • 246 - Railway switches and signals
  • 250 - Radiant energy