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Patent applications and USPTO patent grants for Sommers; Matthew.The latest application filed is for "method and apparatus for tri-color rail signal system with control".
Patent | Date |
---|---|
Method and apparatus for tri-color rail signal system with control Grant 7,385,481 - Sommers , et al. June 10, 2 | 2008-06-10 |
Method and apparatus for tri-color rail signal system with control App 20050151665 - Sommers, Matthew ;   et al. | 2005-07-14 |
Variable optics spot module Grant 6,773,139 - Sommers August 10, 2 | 2004-08-10 |
Variable optics spot module App 20030053310 - Sommers, Matthew | 2003-03-20 |
Optical wave guide App 20030049007 - Sommers, Matthew ;   et al. | 2003-03-13 |
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