1942471

Information

• Patent Grant
• 1942471

• References
• Source

• Patent Number

  1,942,471

• Date Filed

  Not available

• Date Issued

  Tuesday, January 9, 1934
  91 years ago

• CPC

  • H04M5/08 - using connecting means other than cords

• US Classifications

  • 379 - Telephonic communications