2645684

Information

• Patent Grant
• 2645684

• References
• Source

• Patent Number

  2,645,684

• Date Filed

  Not available

• Date Issued

  Tuesday, July 14, 1953
  71 years ago

• CPC

  • H04R9/12 - Gramophone pick-ups using a stylus Recorders using a stylus
  • Y10T74/22 - Miscellaneous

• US Classifications

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