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 |
| 5560062 | Method and device for machining the bottom of footwear A method for removing material from a portion of an edge of a shoe upper folded over the bottom of a shoe, comprises the steps of moving the bottom of the shoe in relation to lateral roughing wheels (15) for roughing the edges according to two different p... | 10/01/1996 |