2148166

Information

• Patent Grant
• 2148166

• References
• Source

• Patent Number

  2,148,166

• Date Filed

  Not available

• Date Issued

  Tuesday, February 21, 1939
  86 years ago

• CPC

  • G10H5/16 - using cathode ray tube

• US Classifications

  • 084 - Music
  • 250 - Radiant energy
  • 313 - Electric lamp and discharge devices
  • 327 - Miscellaneous active electrical nonlinear devices, circuits, and systems
  • 331 - Oscillators
  • 369 - Dynamic information storage or retrieval
  • 984 - Musical instruments