2559561

Information

• Patent Grant
• 2559561

• References
• Source

• Patent Number

  2,559,561

• Date Filed

  Not available

• Date Issued

  Tuesday, July 3, 1951
  73 years ago

• CPC

  • H04M5/08 - using connecting means other than cords
  • H04M9/00 - Interconnection arrangements not involving centralised switching

• US Classifications

  • 379 - Telephonic communications