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 |
| 5078774 | Method and apparatus for heat-strengthening glass sheets The invention relates to an apparatus for heat-strengthening glass sheets. In a heat-strengthening station (3) down-stream of a heating furnace the cooling rate of a glass sheet is retarded by means of plates (9, 11), which are set above and below a glass... | 01/07/1992 |
| 4735647 | Apparatus for removing molten glass from a molten bath thereof In an apparatus for removing molten glass from a bath through a taphole in the wall of a vessel containing the bath, and transporting the molten glass to a processing station, a lance can be moved through the taphole and dipped into the molten glass to pi... | 04/05/1988 |