3547449

Information

• Patent Grant
• 3547449

• References
• Source

• Patent Number

  3,547,449

• Date Filed

  Not available

• Date Issued

  Tuesday, December 15, 1970
  54 years ago

• CPC

  • G09F13/28 - Signs formed by filament-type lamp
  • G11B19/265 - Friction wheel drive

• US Classifications

  • 369 - Dynamic information storage or retrieval