2617894

Information

• Patent Grant
• 2617894

• References
• Source

• Patent Number

  2,617,894

• Date Filed

  Not available

• Date Issued

  Tuesday, November 11, 1952
  72 years ago

• CPC

  • H04R9/12 - Gramophone pick-ups using a stylus Recorders using a stylus
  • H04R3/002 - Damping circuit arrangements for transducers
  • H04R9/16 - signals recorded or played back by vibration of a stylus in two orthogonal directions simultaneously

• US Classifications

  • 369 - Dynamic information storage or retrieval