2923855

Information

• Patent Grant
• 2923855

• References
• Source

• Patent Number

  2,923,855

• Date Filed

  Not available

• Date Issued

  Tuesday, February 2, 1960
  64 years ago

• CPC

  • H04Q9/08 - Calling by using continuous ac

• US Classifications

  • 315 - Electric lamp and discharge devices: systems