2346420

Information

• Patent Grant
• 2346420

• References
• Source

• Patent Number

  2,346,420

• Date Filed

  Not available

• Date Issued

  Tuesday, April 11, 1944
  80 years ago

• CPC

  • H04Q5/08 - Signalling by continuous ac

• US Classifications

  • 379 - Telephonic communications
  • 340 - Communications: electrical