2393354

Information

• Patent Grant
• 2393354

• References
• Source

• Patent Number

  2,393,354

• Date Filed

  Not available

• Date Issued

  Tuesday, January 22, 1946
  79 years ago

• CPC

  • H04M5/12 - Ringing or otherwise calling substations

• US Classifications

  • 379 - Telephonic communications