1949409

Information

• Patent Grant
• 1949409

• References
• Source

• Patent Number

  1,949,409

• Date Filed

  Not available

• Date Issued

  Tuesday, March 6, 1934
  90 years ago

• CPC

  • G11B5/642 - self supporting magnetic material

• US Classifications

  • 360 - Dynamic magnetic information storage or retrieval
  • 148 - Metal treatment
  • G9B - INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER