3905447

Information

• Patent Grant
• 3905447

• References
• Source

• Patent Number

  3,905,447

• Date Filed

  Not available

• Date Issued

  Tuesday, September 16, 1975
  49 years ago

• CPC

  • G10H1/047 - by acousto-mechanical means

• US Classifications

  • 181 - Acoustics
  • 984 - Musical instruments