2472770

Information

• Patent Grant
• 2472770

• References
• Source

• Patent Number

  2,472,770

• Date Filed

  Not available

• Date Issued

  Tuesday, June 7, 1949
  76 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
  • 338 - Electrical resistors
  • 420 - Alloys or metallic compositions