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| Number | Title | Issue Date |
| 5933899 | Low pressure automatic swimming pool cleaner A pool cleaner operating with a pool cleaning system which is not equipped with a booster pump. The apparatus may comprise a frame having a forward end and a rearward end with a water inlet mounted on the frame and receiving a supply of water having a vol... | 08/10/1999 |
| 4558479 | Pool cleaner An improved pool cleaner is provided of the type for submerged random travel generally along the floor and sidewalls of a swimming pool to dislodge and collect debris. The pool cleaner comprises an hydraulically contoured housing consisting of a limited n... | 12/17/1985 |
| 4460055 | System to increase vehicle fuel efficiency A duct system is disclosed for increasing the efficiency of a vehicle by decreasing the air resistance of the vehicle. The system utilizes a ducting system with a projection means at the front end and the back end of the vehicle to equalize air pressure a... | 07/17/1984 |
| 4260036 | Powered ski An improved ski device which incorporates a power unit for providing forward thrust and which is capable of operation over water, snow, ice, artificial surfaces, or the like. In one embodiment, the unit utilizes an upright chassis which is articulated to ... | 04/07/1981 |
| 4027407 | Jet flow alternator A jet flow alternator for reversing the flow of a confined fluid stream which includes selectively controlled tubes to cause said stream to flow in either one of two directions under pressure.... | 06/07/1977 |
| 4011919 | Tireroller A vehicle comprising: a) a conventional body with at least 3 pairs of rolls mounted on horizontal axles, which are distributed over the periphery of opposite sides of the body and connected thereto; b) a pair of annular, elastically deformable running tir... | 03/15/1977 |
