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 |
| 4231660 | Microscope slide with electrode arrangement for cell study, and method for its construction Disclosed is a slide for supporting matter to be observed under a microscope, including a base, a plurality of electrical conductors disposed on the base, an insulating coating distributed over the base to isolate the matter from the conductor, and a plur... | 11/04/1980 |