2225323

Information

• Patent Grant
• 2225323

• References
• Source

• Patent Number

  2,225,323

• Date Filed

  Not available

• Date Issued

  Tuesday, December 17, 1940
  84 years ago

• CPC

  • H04R19/06 - Gramophone pick-ups using a stylus Recorders using a stylus
  • G11B9/00 - Recording or reproducing using a method not covered by one of the main groups G11B3/00 - G11B7/00 Record carriers therefor

• US Classifications

  • 369 - Dynamic information storage or retrieval