US PATENT SUBCLASS 73 / 12.03
.~ Typewriting ribbon or carbon paper

Current as of: June, 1999
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73 /   HD   MEASURING AND TESTING

12.01  DF  TESTING BY IMPACT OR SHOCK {5}
12.03.~ Typewriting ribbon or carbon paper

DEFINITION

Classification: 73/12.03

Typewriting ribbon or carbon paper:

(under subclass 12.01) Subject matter wherein the specimen being tested is either a typewriter ribbon or carbon paper.

(1) Note. Carbon paper is used in the popular sense of the word to mean that type of paper which transfers a surface coating when pressed against a surface, as by a typewriter key.

SEE OR SEARCH THIS CLASS, SUBCLASS:

150, for testing of a coating, per se.

159, for a filament testing, per se.