2645683

Information

• Patent Grant
• 2645683

• References
• Source

• Patent Number

  2,645,683

• Date Filed

  Not available

• Date Issued

  Tuesday, July 14, 1953
  72 years ago

• CPC

  • H04R21/04 - Gramophone pick-ups using a stylus Recorders using a stylus

• US Classifications

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