2345137

Information

• Patent Grant
• 2345137

• References
• Source

• Patent Number

  2,345,137

• Date Filed

  Not available

• Date Issued

  Tuesday, March 28, 1944
  80 years ago

• CPC

  • H04L17/06 - Contact operating means

• US Classifications

  • 178 - Telegraphy
  • 370 - Multiplex communications