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Silicon nitride sintered body and process for producing the same Grant 5,275,772 - Yamamoto , et al. January 4, 1 | 1994-01-04 |
Ceramic circuit board and a method of manufacturing the ceramic circuit board Grant 5,229,549 - Yamakawa , et al. July 20, 1 | 1993-07-20 |
Method of evaluating ceramics Grant 5,217,305 - Yamakawa , et al. June 8, 1 | 1993-06-08 |
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Ceramics substrate with an improved surface structure for electronic components Grant 5,134,461 - Yamakawa , et al. July 28, 1 | 1992-07-28 |
Heat-conductive aluminum nitride sintered body and method of manufacturing the same Grant 5,085,923 - Yamakawa , et al. February 4, 1 | 1992-02-04 |
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