3928709

Information

• Patent Grant
• 3928709

• References
• Source

• Patent Number

  3,928,709

• Date Filed

  Not available

• Date Issued

  Tuesday, December 23, 1975
  49 years ago

• CPC

  • G11B5/70684 - Ferro-ferrioxydes
  • Y10S428/90 - Magnetic feature

• US Classifications

  • 428 - Stock material or miscellaneous articles
  • 252 - Compositions
  • 423 - Chemistry of inorganic compounds
  • G9B - INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER