2500947

Information

• Patent Grant
• 2500947

• References
• Source

• Patent Number

  2,500,947

• Date Filed

  Not available

• Date Issued

  Tuesday, March 21, 1950
  74 years ago

• CPC

  • G10H3/09 - using tapes or wires
  • Y10S84/29 - Tape

• US Classifications

  • 084 - Music
  • 369 - Dynamic information storage or retrieval
  • 984 - Musical instruments