Issued Patents All Time
Showing 26–50 of 51 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5783314 | Sliding component and production method thereof | Masamichi Yamagiwa, Hisao Takeuchi, Akira Yamakawa | 1998-07-21 |
| 5770322 | Ceramic sliding component | Masamichi Yamagiwa, Takeshi Satoh, Hisao Takeuchi, Akira Yamakawa | 1998-06-23 |
| 5767026 | Silicon nitride ceramic and process for forming the same | Naoki Kondoh, Fumihiro Wakai, Yoshihiro Obata, Akira Yamakawa, Masashi Yoshimura | 1998-06-16 |
| 5720917 | Manufacturing method for silicon nitride-based sintered body | Takashi Matsuura, Akira Yamakawa | 1998-02-24 |
| 5647313 | Combination of adjusting shim and cam | Hiromu Izumida, Kaoru Murabe, Akira Yamakawa, Kenji Matsunuma | 1997-07-15 |
| 5605494 | Facility for grinding silicon nitride ceramic workpiece | Kenji Matsunuma, Akira Yamakawa | 1997-02-25 |
| 5599493 | Method of producing silicon nitride ceramic component | Yasushi Ito, Takehisa Yamamoto, Akira Yamakawa, Osamu Komura | 1997-02-04 |
| 5584745 | Method of machining silicon nitride ceramics and silicon nitride ceramics products | Kenji Matsunuma, Akira Yamakawa | 1996-12-17 |
| 5582215 | Ceramic die for cutting and shaping lead frames and method of cleaning the same | Takehisa Yamamoto, Akira Yamakawa, Matsuo Higuchi | 1996-12-10 |
| 5564966 | Grind-machining method of ceramic materials | Takehisa Yamamoto, Yasushi Ito, Akira Yamakawa | 1996-10-15 |
| 5516269 | Zirconia vane for rotary compressors | Akira Yamakawa, Matsuo Higuchi, Harutoshi Ukegawa | 1996-05-14 |
| 5502011 | Silicon nitride sintered body | Takehisa Yamamoto, Kenji Matsunuma, Akira Yamakawa | 1996-03-26 |
| 5372099 | Ceramic adjusting shim | Kenji Matsunuma, Akira Yamakawa | 1994-12-13 |
| 5358797 | Adjusting shim | Kenji Matsunuma, Takehisa Yamamoto, Akira Yamakawa | 1994-10-25 |
| 5346869 | Sintered silicon nitride bodies suitable for use as high impact materials | Takehisa Yamamoto, Kenji Matsunuma, Akira Yamakawa, Masaya Miyake | 1994-09-13 |
| 5328876 | High strength silicon nitride sintered body and process for producing same | Akira Kuibira, Kenji Matsunuma, Yoshishige Takano, Matsuo Higuchi, Masaaki Honda +1 more | 1994-07-12 |
| 5297365 | Method of machining silicon nitride ceramics and silicon nitride ceramics products | Kenji Matsunuma, Akira Yamakawa | 1994-03-29 |
| 5275986 | Silicon nitride sintered body | Takehisa Yamamoto, Tomoyuki Awazu, Akira Yamakawa | 1994-01-04 |
| 5275772 | Silicon nitride sintered body and process for producing the same | Takehisa Yamamoto, Kenji Matsunuma, Akira Yamakawa, Masaya Miyake | 1994-01-04 |
| 5234642 | High strength silicon nitride sintered body and process for producing same | Akira Kuibira, Kenji Matsunuma, Yoshishige Takano, Matsuo Higuchi, Masaaki Honda +1 more | 1993-08-10 |
| 5225127 | Process for production of sintered silicon nitride made article | Yoshishige Takano, Kenji Matsunuma, Matsuo Higuchi, Masaya Miyake | 1993-07-06 |
| 5204297 | Silicon nitride sintered body and process for producing the same | Takehisa Yamamoto, Kenji Matsunuma, Akira Yamakawa, Masaya Miyake | 1993-04-20 |
| 5173458 | Silicon nitride sintered body and process for producing the same | Kenji Matsunuma, Koichi Sogabe, Tomoyuki Awatsu, Masaya Miyake, Takehisa Yamamoto +1 more | 1992-12-22 |
| 5023147 | Ceramics-metal jointed body | Hirohiko Nakata, Nobuya Oooka, Kenya Motoyoshi | 1991-06-11 |
| 4769350 | Silicon nitride sintered material for cutting tools and process for making the same | Akira Yamakawa, Masaya Miyake | 1988-09-06 |