US PATENT SUBCLASS 123 / 188.9
.~ Guide, lubricant, or coolant

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

188.1  DF  VALVE {10}
188.9.~ Guide, lubricant, or coolant

DEFINITION

Classification: 123/188.9

Guide, lubricant or coolant:

(under subclass 188.1) Apparatus either (1) having means to direct the motion of a valve stem or (2) having a substance to reduce friction or (3) has a substance to dissipate heat.