US PATENT SUBCLASS 123 / 665
.~.~ Spherical

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

657  DF  COMBUSTION CHAMBER {11}
664  DF  .~ Combustion chamber shape is a figure of revolution {2}
665.~.~ Spherical

DEFINITION

Classification: 123/665

Spherical:

(under subclass 664) Subject matter in which the figure of revolution is ball-shaped.