1344931

Information

• Patent Grant
• 1344931

• References
• Source

• Patent Number

  1,344,931

• Date Filed

  Not available

• Date Issued

  Tuesday, June 29, 1920
  104 years ago

• CPC

  • H04R7/04 - Plane diaphragms
  • G11B3/50 - Anvils or other supports opposing stylus forces
  • H04R7/16 - Mounting or tensioning of diaphragms or cones

• US Classifications

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