US PATENT SUBCLASS 152 / 156
.~.~ Metallic spring cushion

Current as of: June, 1999
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152 /   HD   RESILIENT TIRES AND WHEELS

151  DF  TIRES, RESILIENT {14}
155  DF  .~ Cushion and pneumatic combined {4}
156.~.~ Metallic spring cushion

DEFINITION

Classification: 152/156

The cushion feature comprises metal springs.

(1) Note. For metallic spring cushion tires, per se, see this class, subclass 247 and indented subclasses.