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Patent applications and USPTO patent grants for Potratz; Douglas R..The latest application filed is for "cylinder-specific spark ignition control system for direct fuel injected two-stroke engine".
Patent | Date |
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Cylinder-specific spark ignition control system for direct fuel injected two-stroke engine Grant 5,924,404 - Ruman , et al. July 20, 1 | 1999-07-20 |
Stern drive marine propulsion system with automatic trim control and exhaust control Grant 4,960,398 - Potratz October 2, 1 | 1990-10-02 |
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