1543886

Information

• Patent Grant
• 1543886

• References
• Source

• Patent Number

  1,543,886

• Date Filed

  Not available

• Date Issued

  Tuesday, June 30, 1925
  100 years ago

• CPC

  • H04M5/06 - affording automatic call distribution
  • H04M9/00 - Interconnection arrangements not involving centralised switching

• US Classifications

  • 379 - Telephonic communications