US PATENT SUBCLASS 91 / 471
MISCELLANEOUS (E.G., METHODS)


Current as of: June, 1999
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91 /   HD   MOTORS: EXPANSIBLE CHAMBER TYPE

471MISCELLANEOUS (E.G., METHODS)


DEFINITION

Classification: 91/471

(under the class definition) Subject matter otherwise provided for.

(1) Note. For example, in this subclass are classified patents containing method claims under the class definition. If a patent contains only method claims it is classified in this subclass as an original. If it contains apparatus claims as well as method claims the original is classified in the appropriate apparatus subclass of this class and cross-referenced to this subclass.