2300822

Information

• Patent Grant
• 2300822

• References
• Source

• Patent Number

  2,300,822

• Date Filed

  Not available

• Date Issued

  Tuesday, November 3, 1942
  82 years ago

• CPC

  • B61L5/1818 - using mobile coloured screen

• US Classifications

  • 335 - Electricity: magnetically operated switches, magnets, and electromagnets
  • 246 - Railway switches and signals