Issued Patents All Time
Showing 51–73 of 73 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7214036 | Screw type vacuum pump | — | 2007-05-08 |
| 7142354 | Wavelength conversion method, wavelength conversion device, and laser beam machine | Tetsuo Kojima, Susumu Konno, Shuichi Fujikawa, Koji Yasui, Takatomo Sasaki +1 more | 2006-11-28 |
| 7132061 | Electroconductive silicon nitride based composite sintered body and method for preparation thereof | — | 2006-11-07 |
| 7029528 | Method for flattening surface of oxide crystal to ultra high degree | Hideomi Koinuma, Yuji Matsumoto, Takatomo Sasaki, Yusuke Mori | 2006-04-18 |
| 7008893 | Silicon nitride-based composite sintered body and producing method thereof | — | 2006-03-07 |
| 7006539 | Nonlinear optical crystal | Takatomo Sasaki, Yusuke Mori | 2006-02-28 |
| 6964560 | Vacuum pump | — | 2005-11-15 |
| 6911162 | Conductive silicon nitride composite sintered body and a process for the production thereof | — | 2005-06-28 |
| 6843849 | Method and apparatus for growing high quality single crystal | Takatomo Sasaki, Yusuke Mori | 2005-01-18 |
| 6844282 | Silicon nitride based composite sintered product and method for production thereof | — | 2005-01-18 |
| 6599637 | Silicon nitride composite substrate | Ai Itoh, Michimasa Miyanaga | 2003-07-29 |
| 6554593 | Dry screw vaccum pump having nitrogen injection | Masaru Mito, Masaaki Takahashi | 2003-04-29 |
| 6551528 | Wavelength conversion crystal and method for generating laser beam, and apparatus for generating laser beam | Takatomo Sasaki, Yusuke Mori | 2003-04-22 |
| 6375443 | Screw rotor type wet vacuum pump | — | 2002-04-23 |
| 6371744 | Dry screw vacuum pump having spheroidal graphite cast iron rotors | Masaru Mito, Masaaki Takahashi | 2002-04-16 |
| 6315535 | Screw vacuum pump having valve controlled cooling chambers | Toshiyasu Hoshi | 2001-11-13 |
| 5827472 | Process for the production of silicon nitride sintered body | Takeshi Satoh, Akira Yamaguchi, Akira Yamakawa | 1998-10-27 |
| 5767026 | Silicon nitride ceramic and process for forming the same | Naoki Kondoh, Fumihiro Wakai, Yoshihiro Obata, Akira Yamakawa, Takao Nishioka | 1998-06-16 |
| 5585055 | Method of manufacturing a composite ceramics sintered body | Koichi Niihara | 1996-12-17 |
| 5459111 | Composite ceramics sintered body | Koichi Niihara | 1995-10-17 |
| 5424256 | Silicon nitride sintered body | Takehisa Yamamoto, Shinichi Yamagata, Jin-Joo Matsui, Akira Yamakawa | 1995-06-13 |
| 5406095 | Light emitting diode array and production method of the light emitting diode | Yoshihisa Koyama, Taku Katayama, Katsuhiko Morita, Toshiki Yoshida, Manabu Endo | 1995-04-11 |
| 5369065 | Silicon nitride sintered body and process for producing the same | Jin-Joo Matsui, Takehisa Yamamoto, Akira Yamakawa | 1994-11-29 |