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...that "patent leather" got its name because the process of applying the polished black finish to leather was once patented?
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| Number | Title | Issue Date |
| 5883484 | Controller for driving a permanent magnet type synchronous motor A controller for driving permanent magnet type synchronous motor. A motor terminal voltage or IPM (intelligent power module) input voltage necessary to achieve a target operating point is computed based on torque command and motor revolution. When the com... | 03/16/1999 |
| 5844342 | Power output apparatus and method of controlling the same A power output apparatus 20 includes an engine 50, a clutch motor 30 having rotors 31 and 33 respectively linked with a crankshaft 56 and a drive shaft 22, an assist motor 40 attached to a rotor-rotating shaft 38, a first clutch 45 for connecting and disc... | 12/01/1998 |
| 5739649 | Fail check device and method for AC motor control circuit A device and method for detecting a failure which are used with an AC motor control circuit to detect a failure in a total of three current sensors correlated to phases U, V, W of a motor. Three types of current paths are formed in order to position two c... | 04/14/1998 |
