1556950

Information

• Patent Grant
• 1556950

• References
• Source

• Patent Number

  1,556,950

• Date Filed

  Not available

• Date Issued

  Tuesday, October 13, 1925
  99 years ago

• CPC

  • G10D9/046 - with continuous change of tonal pitch

• US Classifications

  • 084 - Music
  • 984 - Musical instruments