2429137

Information

• Patent Grant
• 2429137

• References
• Source

• Patent Number

  2,429,137

• Date Filed

  Not available

• Date Issued

  Tuesday, October 14, 1947
  77 years ago

• CPC

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

• US Classifications

  • 338 - Electrical resistors
  • 369 - Dynamic information storage or retrieval