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Patent applications and USPTO patent grants for Richter; William Mark.The latest application filed is for "power-supplemented manual height-adjusting wheelchair".
Patent | Date |
---|---|
Power-supplemented manual height-adjusting wheelchair Grant 7,988,172 - Richter , et al. August 2, 2 | 2011-08-02 |
Linear measurement apparatus and method Grant 7,841,098 - Richter November 30, 2 | 2010-11-30 |
Power-Supplemented Manual Height-Adjusting Wheelchair App 20100148466 - Richter; William Mark ;   et al. | 2010-06-17 |
Linear Measurement Apparatus And Method App 20090320307 - Richter; William Mark | 2009-12-31 |
Wheelchair Balance Tool And Method App 20090314054 - Richter; William Mark | 2009-12-24 |
Ergonomic wheelchair hand rim Grant 7,303,203 - Richter , et al. December 4, 2 | 2007-12-04 |
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