2397888

Information

• Patent Grant
• 2397888

• References
• Source

• Patent Number

  2,397,888

• Date Filed

  Not available

• Date Issued

  Tuesday, April 2, 1946
  79 years ago

• CPC

  • H04R19/06 - Gramophone pick-ups using a stylus Recorders using a stylus

• US Classifications

  • 369 - Dynamic information storage or retrieval
  • 381 - Electrical audio signal processing systems and devices