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| Number | Title | Issue Date |
| 4069856 | Crawler-type vehicle wheels having impact absorbing rims with resilient biasing means Wheels of a crawler-type vehicle have rims that are laterally movable relative to the axis in response to a force subjected on the rim. The rim is biased by resilient material to return to its normal position in response to removal of the force on the rim... | 01/24/1978 |
| 4068698 | Vehicle wheel having radially movable impact absorbing rims A vehicle wheel has rims that are radially movable relative to the hub in response to forces acting on the rim. The rim is biased by resilient material to return to its normal position in response to removal of the force on the rim.... | 01/17/1978 |
