2279815

Information

• Patent Grant
• 2279815

• References
• Source

• Patent Number

  2,279,815

• Date Filed

  Not available

• Date Issued

  Tuesday, April 14, 1942
  82 years ago

• CPC

  • H04R21/028 - with a fluid as resistance material
  • H04R21/04 - Gramophone pick-ups using a stylus Recorders using a stylus

• US Classifications

  • 369 - Dynamic information storage or retrieval
  • 338 - Electrical resistors