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Penn Jillette of Penn and Teller fame has patented a "Hydro-Therapeutic Stimulator", which uses a hot tub for stimulation.
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| Number | Title | Issue Date |
| 6928811 | Fluid coupling A fluid coupling comprising a pump having a pump shell and a plurality of impellers arranged in the pump shell, a turbine having a turbine shell arranged to be opposed to the pump and a plurality of runners arranged in the turbine shell, and a baffle mechanism arran... | 08/16/2005 |
| 5048371 | Continuously variable transmission provided with a torque converter A continuously variable transmission (3, 4, 5, 6, 7, 8, 9) is provided with a torque converter (2) having an ingoing shaft (1), whereby the torque converter has such torque converting factors at various speeds of the ingoing shaft that the torque characte... | 09/17/1991 |
| 3986356 | Hydrodynamic torque converter for vehicles, especially for motor vehicles A hydrodynamic torque converter for vehicles, particularly for passenger motor vehicles, with at least one pump wheel, one turbine wheel and one guide wheel supported on a free-wheeling device, in which the guide blades are automatically adjustable, when ... | 10/19/1976 |
