2787661

Information

• Patent Grant
• 2787661

• References
• Source

• Patent Number

  2,787,661

• Date Filed

  Not available

• Date Issued

  Tuesday, April 2, 1957
  68 years ago

• CPC

  • H04Q1/18 - Electrical details

• US Classifications

  • 379 - Telephonic communications
  • 340 - Communications: electrical