3909841

Information

• Patent Grant
• 3909841

• References
• Source

• Patent Number

  3,909,841

• Date Filed

  Not available

• Date Issued

  Tuesday, September 30, 1975
  49 years ago

• CPC

  • G11B15/34 - through non-skip drive means
  • G03B31/02 - in which sound track is on a moving-picture film
  • G11B15/04 - Preventing, inhibiting, or warning against accidental erasing or double recording
  • G11B15/10 - Manually-operated control Solenoid-operated control

• US Classifications

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