3420135

Information

• Patent Grant
• 3420135

• References
• Source

• Patent Number

  3,420,135

• Date Filed

  Not available

• Date Issued

  Tuesday, January 7, 1969
  56 years ago

• CPC

  • G10D13/085 - keyboard operated
  • A63H5/00 - Musical or noise- producing devices for additional toy effects other than acoustical
  • G05B19/126 - using cards, tapes or discs having protuberances
  • G06K19/067 - Record carriers with conductive marks, printed circuits or semiconductor circuit elements
  • G09B15/08 - Practive keyboards
  • G10G1/00 - Means for the representation of music
  • G10G1/02 - Chord or note indicators, fixed or adjustable, for keyboard of fingerboards

• US Classifications

  • 084 - Music