Issued Patents All Time
Showing 26–50 of 52 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5219803 | Sintered body of aluminum nitride | Akira Yamakawa, Hitoyuki Sakanoue, Koichi Sogabe | 1993-06-15 |
| 5217305 | Method of evaluating ceramics | Akira Yamakawa, Kozo Ishizaki, Koji Watari | 1993-06-08 |
| 5204297 | Silicon nitride sintered body and process for producing the same | Takehisa Yamamoto, Takao Nishioka, Kenji Matsunuma, Akira Yamakawa | 1993-04-20 |
| 5190895 | Ceramics composite material | Kiyoshi Uchida, Yukio Shimokawa, Hiroshi Nomura, Hirohiko Nakata | 1993-03-02 |
| 5173458 | Silicon nitride sintered body and process for producing the same | Takao Nishioka, Kenji Matsunuma, Koichi Sogabe, Tomoyuki Awatsu, Takehisa Yamamoto +1 more | 1992-12-22 |
| 5147832 | Thermal conductive colored aluminum nitride sintered body and method of preparing the same | Kouhei Shimoda, Takao Maeda, Kouichi Sogabe | 1992-09-15 |
| 5141579 | ProducingSi.sub.3 N.sub.4 composite by sheeting a mixture of Si.sub.3 N.sub . | Tatsuji Matsui, Osamu Komura | 1992-08-25 |
| 5085923 | Heat-conductive aluminum nitride sintered body and method of manufacturing the same | Akira Yamakawa, Hitoyuki Sakanoue, Hisao Takeuchi, Koichi Sogabe, Akira Sasame | 1992-02-04 |
| 5034357 | Heat-conductive aluminum nitride sintered body and method of manufacturing the same | Akira Yamakawa, Hitoyuki Sakanoue, Hisao Takeuchi, Koichi Sogabe, Akira Sasame | 1991-07-23 |
| 5010388 | Connection structure between components for semiconductor apparatus | Akira Sasame, Hitoyuki Sakanoue, Hisao Takeuchi, Akira Yamakawa, Yasuhisa Yushio +1 more | 1991-04-23 |
| 4994418 | Ceramic compact and a process for the production of the same | Akira Yamakawa, Yoshihiko Doi | 1991-02-19 |
| 4965659 | Member for a semiconductor structure | Akira Sasame, Hitoyuki Sakanoue, Akira Yamakawa | 1990-10-23 |
| 4886709 | Member for semiconductor apparatus | Akira Sasame, Hitoyuki Sakanoue, Hisao Takeuchi, Akira Yamakawa, Yasuhisa Yushio | 1989-12-12 |
| 4769350 | Silicon nitride sintered material for cutting tools and process for making the same | Takao Nishioka, Akira Yamakawa | 1988-09-06 |
| 4764490 | Process for preparation of sintered silicon nitride | Akira Yamakawa, Takao Nishioka | 1988-08-16 |
| 4745022 | Composite sintered silicon nitride material and cutting tool made therefrom | Akira Yamakawa | 1988-05-17 |
| 4686080 | Composite compact having a base of a hard-centered alloy in which the base is joined to a substrate through a joint layer and process for producing the same | Akira Hara, Shuji Yazu | 1987-08-11 |
| 4659508 | Electrically-conductive sintered compact of silicon nitride machinable by electrical discharge machining and process of producing the same | Matsuo Higuchi, Hisao Takeuchi, Eiji Kamijo | 1987-04-21 |
| 4639352 | Hard alloy containing molybdenum | Mitsuo Kodama, Minol Nakano, Tsuyoshi Asai, Akio Hara | 1987-01-27 |
| 4628178 | Tool for warm and hot forgings and process for manufacturing the same | Yasuhiro Saito, Matsuo Higuchi | 1986-12-09 |
| 4492846 | Process for the production of bonded hard alloys | Akio Hara, Shuji Yazu | 1985-01-08 |
| 4384884 | Process for the production of a hard solid solution containing molybdenum | Minol Nakano, Mitsuo Kodama, Akio Hara | 1983-05-24 |
| 4279651 | Sintered hard metal and the method for producing the same | Naoji Fujimori, Masaaki Tobioka, Tsuyoshi Asai, Takaharu Yamamoto | 1981-07-21 |
| 4265662 | Hard alloy containing molybdenum and tungsten | Minol Nakano, Takaharu Yamamoto, Akio Hara | 1981-05-05 |
| 4225344 | Process for producing sintered hard metals and an apparatus therefor | Naoji Fujimori, Takaharu Yamamoto, Akio Hara | 1980-09-30 |