2278485

Information

• Patent Grant
• 2278485

• References
• Source

• Patent Number

  2,278,485

• Date Filed

  Not available

• Date Issued

  Tuesday, April 7, 1942
  82 years ago

• CPC

  • H04L17/14 - with optical sensing means

• US Classifications

  • 370 - Multiplex communications
  • 178 - Telegraphy
  • 250 - Radiant energy