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Class Information
Number: 400/135
Name: Typewriting machines > Typing to produce pierced character
Description: Subject matter wherein significance is attributed to a typewriter in which imprinting on a record-medium* is accomplished by a type-die* that contacts a surface of the record-medium and cuts through that surface into the opposite surface to form one or more perforations in the surface, which perforations taken together represent a character*.
Sub-classes under this class:
Patents under this class:
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