3639747

Information

• Patent Grant
• 3639747

• References
• Source

• Patent Number

  3,639,747

• Date Filed

  Not available

• Date Issued

  Tuesday, February 1, 1972
  53 years ago

• CPC

  • H03J1/042 - Means insuring a precise reading of the dial

• US Classifications

  • 362 - Illumination
  • 116 - Signals and indicators
  • 455 - Telecommunications