1472857

Information

• Patent Grant
• 1472857

• References
• Source

• Patent Number

  1,472,857

• Date Filed

  Not available

• Date Issued

  Tuesday, November 6, 1923
  101 years ago

• CPC

  • G11B3/5836 - means connected to the pick-up arm or head
  • Y10S29/098 - Rotating, reciprocating or oscillating cleaner

• US Classifications

  • 369 - Dynamic information storage or retrieval
  • 015 - Brushing, scrubbing, and general cleaning
  • 029 - Metal working
  • G9B - INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER