...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 |
| 7299852 | Vertical blind that is expanded and folded quickly and conveniently A vertical blind includes a headrail, a fixing bracket, a plurality of juxtaposed movable brackets, a drive bracket, a plurality of driven blocks, a plurality of drive blocks, a plurality of mounting seats, a plurality of shades, a pull cord unit, and a positioning ... | 11/27/2007 |
| 4073034 | Door-supporting system for multipanel, side-opening doors A door-supporting system for a multipanel, side-opening door includes a single track from which each panel is supported.... | 02/14/1978 |