US PATENT SUBCLASS 123 / 190.13
.~.~.~ With lubrication means
Current as of:
June, 1999
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123 /
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INTERNAL-COMBUSTION ENGINES
188.1
DF
VALVE
{10}
190.1
DF
.~ Rotary {7}
190.12
DF
.~.~ Sleeve {1}
190.13
.~.~.~ With lubrication means
DEFINITION
Classification: 123/190.13
With lubrication means:
(under subclass 190.12) Apparatus having a means to reduce the friction of the valve.
