A stimulus unit is connected to a fluid supply and is positioned on the body, such as the abdomen or back....http://www.google.com/patents/US6289240?utm_source=gb-gplus-sharePatent US6289240 - Fluid biofeedback deviceAdvanced Patent SearchPublication numberUS6289240 B1Publication typeGrantApplication numberUS 09/352,733Publication dateSep 11, 2001Filing dateJul 13, 1999Priority dateJul 13, 1999Fee