US PATENT SUBCLASS 152 / 30
.~.~.~ Rubber and pneumatic
Current as of:
June, 1999
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152 /
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RESILIENT TIRES AND WHEELS
1
DF
SPRING WHEELS
{3}
17
DF
.~ Spring encircling rigid annulus {10}
29
DF
.~.~ With plural spring types {6}
30
.~.~.~ Rubber and pneumatic
DEFINITION
Classification: 152/30
In a spring wheel having a spring encircling rigid annulus supported by plural spring types, said types are limited to rubber and pneumatic springs.