1348499

Information

• Patent Grant
• 1348499

• References
• Source

• Patent Number

  1,348,499

• Date Filed

  Not available

• Date Issued

  Tuesday, August 3, 1920
  104 years ago

• CPC

  • H04M15/26 - with a meter or performing charging or billing at the exchange controlled by an operator

• US Classifications

  • 281 - Books, strips, and leaves