US PATENT SUBCLASS 123 / 193.6
.~ Piston

Current as of: June, 1999
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123 /   HD   INTERNAL-COMBUSTION ENGINES

193.1  DF  PARTICULAR PISTON AND ENCLOSING CYLINDER CONSTRUCTION {3}
193.6.~ Piston {1}
193.4  DF  .~.~> Having detail to guiding structure cooperating with cylinder

DEFINITION

Classification: 123/193.6

Piston:

(under subclass 193.1) Apparatus having a structure, shape, material or construction which is utilized in a piston (i.e., a solid cylinder or disk fitting snugly in a cylinder and reciprocating).