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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 |
| 5001455 | Portable signaling device A portable water-resistant device for signaling vehicles such as a taxi is formed of a lightweight, transparent plastic and is battery powered. The signaling device is provided with a first housing, a second housing movable relative to the first housing, ... | 03/19/1991 |
| 4964711 | Viewing device The present invention provides a viewing device, said device being positioned within the outer and inner surfaces of an entry door, to ascertain the identity of prospective entrants from within the confines of a dewlling. The device includes on the outer ... | 10/23/1990 |
