US PATENT SUBCLASS 400 / 174
.~ Type-head, per se

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

139  DF  INCLUDING TYPE-SET-ASSEMBLAGE MOUNTED ON CARRIER AND RELATIVELY MOVABLE FOR SELECTION AND FOR IMPACT OF TYPE-FACE {11}
174.~ Type-head, per se {1}
175  DF  .~.~> Detachable from carrier (e.g., interchangeable)

DEFINITION

Classification: 400/174

Type-head, per se:

(under subclass 139) Subject matter wherein significance is attributed to the type-head* that bears a type-set-assemblage* in a typewriter.