2166986

Information

• Patent Grant
• 2166986

• References
• Source

• Patent Number

  2,166,986

• Date Filed

  Not available

• Date Issued

  Tuesday, July 25, 1939
  85 years ago

• CPC

  • G11B3/093 - Means coupled to the cover
  • G11B33/022 - Cases

• US Classifications

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