Issued Patents All Time
Showing 1–25 of 25 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9006854 | Avalanche photodiode | Tadao Ishibashi, Masahiro Nada, Yoshifumi Muramoto, Haruki Yokoyama | 2015-04-14 |
| 8754445 | Semiconductor device | Tadao Ishibashi, Yoshifumi Muramoto, Toshihide Yoshimatsu, Haruki Yokoyama | 2014-06-17 |
| 8729602 | Avalanche photodiode | Tadao Ishibashi, Masahiro Nada, Yoshifumi Muramoto, Haruki Yokoyama | 2014-05-20 |
| 8575650 | Avalanche photodiode | Tadao Ishibashi, Yoshifumi Muramoto, Fumito Nakajima, Haruki Yokoyama | 2013-11-05 |
| 7880197 | Avalanche photodiode having doping region with monotonically increasing concentration distribution | Tadao Ishibashi, Yukihiro Hirota, Yoshifumi Muramoto | 2011-02-01 |
| 7787736 | Semiconductor optoelectronic waveguide | Tadao Ishibashi, Ken Tsuzuki | 2010-08-31 |
| 7599595 | Semiconductor optoelectronic waveguide | Tadao Ishibashi, Ken Tsuzuki | 2009-10-06 |
| 7557387 | Avalanche photodiode | Tadao Ishibashi, Yukihiro Hirota | 2009-07-07 |
| 6920166 | Thin film deposition method of nitride semiconductor and nitride semiconductor light emitting device | Tetsuya Akasaka, Toshio Nishida, Naoki Kobayashi, Tadashi Saitoh | 2005-07-19 |
| 5537038 | Magnetic flux measuring method and apparatus for detecting high frequency components of magnetic flux with high speed orientation | — | 1996-07-16 |
| 5512821 | Method and apparatus for magnetically detecting defects in an object with compensation for magnetic field shift by means of a compensating coil | Yasuhiro Matsufuji, Hiroshi Maki, Mamoru Inaba, Kenichi Iwanaga, Atsuhisa Takeoshi +1 more | 1996-04-30 |
| 5502382 | Apparatus for magnetic inspection using magnetic shield, with specific relation of distance E between magnetic sensors and distance L between each magnetic sensor and the object to be inspected, to obtain optimum S/N | Yasuhiro Matsufuji | 1996-03-26 |
| 5357198 | Apparatus for magnetic inspection using magnetic shield | Yasuhiro Matsufuji | 1994-10-18 |
| 5287059 | Saturable core magnetometer with a parallel resonant circuit in which the W3 DC level changes with a change in an external magnetic field | Yoshihiro Murakami | 1994-02-15 |
| 5235275 | Magnetic inspection apparatus for thin steel strip having magnetizer and detection coil within a hollow roller rotated by the steel strip | Masaki Takenaka, Kenichi Iwanaga, Takato Furukawa, Atsuhisa Takekoshi | 1993-08-10 |
| 5151793 | Recording medium playing apparatus | Hiroshi Ito, Bonpei Inaba | 1992-09-29 |
| 5132608 | Current measuring method and apparatus therefor | Katsuyuki Nishifuji | 1992-07-21 |
| 4742298 | Apparatus for detecting surface flaw of pipeline by electromagnetic induction | Toshiaki Hosoe | 1988-05-03 |
| 4716366 | Eddy current distance signal apparatus with temperature change compensation means | Toshiaki Hosoe, Yoshihiro Kawase | 1987-12-29 |
| 4647854 | Apparatus for measuring the level of the molten metal in the mold of a continuous casting machine | Takeo Yamada, Yoshihiro Kawase | 1987-03-03 |
| 4567435 | Method and apparatus for continuously measuring distance utilizing eddy current and having temperature difference influence elimination | Takeo Yamada, Tomohisa Yamamoto, Yoshihiro Kawase | 1986-01-28 |
| 4309902 | Method for continuously measuring steepness of defective flatness of metal strip during rolling | Kazuo Sano, Katsujiro Watanabe | 1982-01-12 |
| 4303883 | Apparatus for detecting the center of a welded seam in accordance with fundamental harmonic component suppression | Toshihiro Mori, Hironobu Akuzawa | 1981-12-01 |
| 4267508 | Apparatus for non-contact measurement of distance from a metallic body using a detection coil in the feedback circuit of an amplifier | — | 1981-05-12 |
| 4186792 | Apparatus for monitoring and controlling the level of the molten metal in the mold of a continuous casting machine | Takeo Yamada, Yoshio Miyashita, Katsuhiko Murakami, Masahisa Tate, Kiyoshi Mizui | 1980-02-05 |