Did You Know...
...that power steering was invented by independent inventor Francis W. Davis? As chief engineer in the 1920s of the truck division of the Pierce Arrow Motor Car Company, he saw how hard it was to steer heavy vehicles. So that he would be able to keep the profits from his future invention, Davis left his job, rented a small engineering shop in Waltham, Mass., and developed a hydraulic power steering system that led to power steering.
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| Number | Title | Issue Date |
| 4777738 | Slip-resistant sole A slip-resistant shoe sole comprising an outsole layer having a bottom surface defining a region of contact between the sole and the ground, the outsole layer bearing a plurality of channels opening onto the bottom surface to define a pattern of elongated... | 10/18/1988 |
| 4724624 | Slip resistant shoe A shoe that includes an outsole having a plurality of gripping portions, the locus of the gripping portions defining a path extending from the outermost portion of the shoe below the small toe generally toward the ball of the foot at the large toe, with t... | 02/16/1988 |
