663552

Information

• Patent Grant
• 663552

• References
• Source

• Patent Number

  663,552

• Date Filed

  Not available

• Date Issued

  Tuesday, December 11, 1900
  124 years ago

• CPC

  • G10C3/161 - specially adapted for upright pianos
  • G10F1/04 - Pianofortes which have no keyboard

• US Classifications

  • 084 - Music