3420534

Information

• Patent Grant
• 3420534

• References
• Source

• Patent Number

  3,420,534

• Date Filed

  Not available

• Date Issued

  Tuesday, January 7, 1969
  56 years ago

• CPC

  • H04R17/04 - Gramophone pick-ups using a stylus Recorders using a stylus

• US Classifications

  • 369 - Dynamic information storage or retrieval