In 1608, Dutch eyeglass maker Hans Lipperhey filed the first patent for a working telescope. The patent was denied.
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| Number | Title | Issue Date |
| 7827960 | Controller of engine A controller of an engine that can use a blended fuel with alcohol blended therein, the controller includes: an ignition timing controller, operable to control an ignition timing of the engine; an exhaust air-fuel ratio detector, operable to detect an exhaust air-fu... | 11/09/2010 |
| 7685995 | Controller for internal combustion engine The alcohol concentration detection value estimated or detected by the alcohol concentration sensor is corrected in accordance with intensity, frequency and the like of knocking to set the alcohol concentration detection value after the correction as the alcohol con... | 03/30/2010 |
| 7168300 | Gasoline identification system and method for identifying gasoline type The types of gasolines having different distillation characteristics and various compositions are identified accurately and rapidly. A pulse voltage is applied for a predetermined time to a liquid type identifying sensor heater including a heater and an identifying ... | 01/30/2007 |
| 7159565 | Method of controlling ignition timing in internal combustion engine An internal combustion engine includes an in-cylinder injector injecting a fuel into a cylinder and an intake port injector injecting a fuel into an intake port. In the internal combustion engine, when a fuel injection ratio between the in-cylinder injector and the ... | 01/09/2007 |
| 5515280 | Electronic control device for a multi-fuel internal combustion engine With an electronic control device for an internal combustion engine using an oxygenated compound mixed fuel, operating conditions of the engine are detected, and are utilized to determine fundamental control data for the engine, while the dielectric const... | 05/07/1996 |
| 5050555 | System and method for controlling ignition timing for internal combustion engine in which alcohol is mixed with gasoline A system and method for controlling ignition timing for a lean burn type internal combustion engine in which alcohol is mixed with gasoline. A final ignition timing value ADV is determined from a basic ignition timing value BASE, a feedback correction qua... | 09/24/1991 |