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 |
| 7198755 | Multichannel fluorosensor A multichannel fluorosensor includes an optical module and an electronic module combined in a watertight housing with an underwater connector. The fluorosensor has an integral calibrator for periodical sensitivity validation of the fluorosensor. The optical module h... | 04/03/2007 |
| 7142299 | Turbidity sensor A turbidity measuring system is provided with a chamber and a sensor having a watertight housing, a light source, a first light focusing device for focusing a light emitted from the light source and passing therethough into a sample liquid, a second light focusing d... | 11/28/2006 |
| 6916219 | Remote sampling system An automated system for periodically sampling water bodies, such as lakes, and delivering the test results to a remote computer using a communication system. In particular, the system has a variable buoyancy profiler with a dynamic buoyancy compensator responding ap... | 07/12/2005 |
| 6842243 | Turbidity sensor A small size turbidity sensor for underwater in-situ measurements in the wide range of turbidity values is disclosed that may be integrated into a housing with other underwater sensors. The turbidity sensor incorporates micro focusing devices and light stop that giv... | 01/11/2005 |