3821489

Information

• Patent Grant
• 3821489

• References
• Source

• Patent Number

  3,821,489

• Date Filed

  Not available

• Date Issued

  Friday, June 28, 1974
  50 years ago

• CPC

  • G11B31/003 - with radio receiver
  • H05K11/02 - with vehicles

• US Classifications

  • 369 - Dynamic information storage or retrieval
  • G9B - INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER