1832308

Information

• Patent Grant
• 1832308

• References
• Source

• Patent Number

  1,832,308

• Date Filed

  Not available

• Date Issued

  Tuesday, November 17, 1931
  93 years ago

• CPC

  • H04L25/44 - using relay distributors

• US Classifications

  • 178 - Telegraphy
  • 370 - Multiplex communications