2164889

Information

• Patent Grant
• 2164889

• References
• Source

• Patent Number

  2,164,889

• Date Filed

  Not available

• Date Issued

  Tuesday, July 4, 1939
  85 years ago

• CPC

  • H03J1/02 - Indicating arrangements

• US Classifications

  • 116 - Signals and indicators
  • 334 - Tuners
  • 361 - Electricity: electrical systems and devices