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 |
| 4912638 | Biofeedback lifting monitor An apparatus for testing and teaching the lifting capacity and technique of a user includes a brake or clutch for resisting user input force which is controlled by feedback from sensors through a computer. Several operating modes can be chosen, including ... | 03/27/1990 |
| 4815046 | Ultrasonic sensor system An ultrasonic sensor system particularly for automatic door openers of a swinging door type, in addition to sensors (14) for people approaching a door for controlling opening and closing purposes, has at least one microprocessor controlled ultrasonic beam... | 03/21/1989 |
| 4398055 | Radiant energy converter having sputtered CdSiAs2 absorber Thin film radiant energy converter having a sputtered CdSiAs2 photovoltaic absorber layer and a thermally evaporated CdS top layer. The sputtering technique with multiple targets (Cd, Si, As) is used to obtain stoichiometric CdSiAs2 ... | 08/09/1983 |
