2148328

Information

• Patent Grant
• 2148328

• References
• Source

• Patent Number

  2,148,328

• Date Filed

  Not available

• Date Issued

  Tuesday, February 21, 1939
  85 years ago

• CPC

  • H03G5/02 - Manually-operated control
  • H03G9/06 - for gain control and tone control
  • H03G9/26 - in untuned amplifying stages as well as in frequency-selective amplifying stages
  • Y10T74/20486 - Drum and cable

• US Classifications

  • 336 - Inductor devices
  • 074 - Machine element or mechanism
  • 455 - Telecommunications