US PATENT SUBCLASS 84 / 142
.~.~.~.~ Extra center holes

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}
142.~.~.~.~ Extra center holes

DEFINITION

Classification: 84/142

Holes near the middle of the tracker are vented by note perforations in the sheet.