US PATENT SUBCLASS 84 / 129
.~.~.~.~.~ Roller and disk or cone

Current as of: June, 1999
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84 /   HD   MUSIC

1  DF  INSTRUMENTS {9}
*  DD  .~ Automatic {13}
115  DF  .~.~ Selectors {8}
122  DF  .~.~.~ Winding and rewinding {16}
128  DF  .~.~.~.~ Speed control {3}
129.~.~.~.~.~ Roller and disk or cone

DEFINITION

Classification: 84/129

Patents including this specific variable friction-gear.