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| Number | Title | Issue Date |
| 5591687 | Silicon nitride based sintered product A silicon nitride based sintered product produced with Si powder, a Si3 N4 powder, and an assistant component effective for sintering silicon nitride as raw materials. A resultant sintered product has fine tissue, exhibits little pre... | 01/07/1997 |
| 5324551 | Slidable ceramic member and method of manufacturing same A slidable ceramic member includes a base of a sintered ceramic material which is a compound including silicon (Si) as a constituent element, the base having a sliding surface, and a coated layer covering the sliding surface of the base, the coated layer ... | 06/28/1994 |
| 5124598 | Intake/exhaust valve actuator An intake/exhaust valve actuator includes a movable permanent magnet coupled to the shank end of an intake/exhaust valve, a first fixed electromagnet having a plurality of fixed magnetic poles confronting a side of the movable permanent magnet, for openin... | 06/23/1992 |
