US PATENT SUBCLASS 418 / 150
WORKING CHAMBER SURFACE EXPRESSED MATHEMATICALLY

Current as of: June, 1999
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418 /   HD   ROTARY EXPANSIBLE CHAMBER DEVICES

150WORKING CHAMBER SURFACE EXPRESSED MATHEMATICALLY

DEFINITION

Classification: 418/150

(under the class definition) Apparatus in which either the cylinder or working member surface forming part of the expansible working chamber is represented in a claim by a mathematical formula or equation.