2133816

Information

• Patent Grant
• 2133816

• References
• Source

• Patent Number

  2,133,816

• Date Filed

  Not available

• Date Issued

  Tuesday, October 18, 1938
  85 years ago

• CPC

  • H03G9/06 - for gain control and tone control

• US Classifications

  • 455 - Telecommunications
  • 333 - Wave transmission lines and networks