US PATENT SUBCLASS 400 / 138.5
.~.~.~.~.~ And rotating contact with platen

Current as of: June, 1999
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400 /   HD   TYPEWRITING MACHINES

135  DF  TYPING TO PRODUCE PIERCED CHARACTER {2}
137  DF  .~ Check-protection character {1}
138  DF  .~.~ By type-die mounted on carrier movable for selection of character {2}
138.2  DF  .~.~.~ On rotatable carrier (e.g., for scarifying elements, etc.) {3}
138.4  DF  .~.~.~.~ Including plural-character type-die {1}
138.5.~.~.~.~.~ And rotating contact with platen

DEFINITION

Classification: 400/138.5

And rotating contact with platen:

(under subclass 138.4) Subject matter wherein the type-die* elements turn about an axis while being impressed against the record-medium* that is backed up by a platen*.