3144589

Information

• Patent Grant
• 3144589

• References
• Source

• Patent Number

  3,144,589

• Date Filed

  Not available

• Date Issued

  Tuesday, August 11, 1964
  59 years ago

• CPC

  • H04Q5/08 - Signalling by continuous ac

• US Classifications

  • 361 - Electricity: electrical systems and devices