US PATENT SUBCLASS 400 / 391.4
.~.~.~ With power assist for mechanism

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

383  DF  TYPE-BAR-ACTION MECHANISM OR TYPE-FACE ON TYPE-BAR OR TYPE-FACE INKER {19}
390  DF  .~ With end-thrust mechanism for type-bar {3}
391  DF  .~.~ Type-bar slidable on flat support {4}
391.4.~.~.~ With power assist for mechanism

DEFINITION

Classification: 400/391.4

With power assist for mechanism:

(under subclass 391) Subject matter wherein the movement of the type-bar* is effected with the help of electrical or electromagnetic energy applied to the type-bar-moving means.