Issued Patents All Time
Showing 1–19 of 19 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12415914 | Polypropylene-based resin composition containing ultrahigh molecular weight propylene (co)polymer | Yutaka Yokoyama, Akihiro Kamimura, Shuji Akinaga | 2025-09-16 |
| 11459454 | Polypropylene composition and molded article | Yutaka Yokoyama, Akihiro Kamimura | 2022-10-04 |
| 8922760 | Defocused optical rotation measurement apparatus, optical rotation measurement method and defocused optical fiber system | — | 2014-12-30 |
| 5701177 | Method for detecting fault of optical fiber gyro and apparatus for diagnosing fault of the same | Tatsuya Kumagai, Osamu Kobayashi, Munehiro Akiyama, Shigeru Oho, Hisao Sonobe | 1997-12-23 |
| 5677973 | Method of aligning optical fiber to optical fiber or optical fiber to optical element at junction and optical fiber array | Toshiya Yuhara, Hisao Iitsuka, Mamoru Ichimura, Tomohiro Murakami | 1997-10-14 |
| 5608525 | Phase adjustable optical fiber gyro using both even order harmonics and an orthogonal component of an even-order harmonic | Tatsuya Kumagai, Keiji Abe, Munehiro Akiyama, Hisao Sonobe, Shigeru Oho | 1997-03-04 |
| 5555235 | Optical fiber gyro with memory storing data measured under application of angular velocity | Tatsuya Kumagai, Munehiro Akiyama, Shigeru Oho, Hisao Sonobe | 1996-09-10 |
| 5482525 | Method of producing elliptic core type polarization-maintaining optical fiber | Kohdo Yamada, Masashi Nakamura, Kazuya Murakami, Yuuetsu Takuma | 1996-01-09 |
| 5471301 | Optical fiber gyro | Tatsuya Kumagai, Hisao Iitsuka, Wataru Ohnuki, Toshiyuki Tetsu | 1995-11-28 |
| 5396327 | Fiber-optic gyroscope having angular velocity correction | Tatsuya Kumagai, Hisao Sonobe | 1995-03-07 |
| 5264914 | Interference sensor and method utilizing extracted alliasing frequency components | Shigeru Oho, Hisao Sonobe, Junichi Makino, Tatsuya Kumagai | 1993-11-23 |
| 5239362 | Fiber-optic rotation sensor | — | 1993-08-24 |
| 5208652 | An improved optical branching/coupling unit for an optical fiber gyroscope, and navigation system employing the same | Hisao Sonobe, Shigeru Oho, Junichi Makino, Yasuhiro Gunji, Tatsuya Kumagai | 1993-05-04 |
| 4859223 | Method of manufacturing polarization-maintaining optical fibers | Koudo Yamada, Yuuetsu Takuma, Tatsuo Teraoka | 1989-08-22 |
| 4848867 | Rotary joint for polarization plane maintaining optical fibers | Toshio Fukahori, Noribumi Shiina, Hitoshi Morinaga | 1989-07-18 |
| 4818047 | Polarized wave preserving fiber | Yuuetsu Takuma, Tatsuya Kumagai, Toshihide Tokunaga, Kohdo Yamada | 1989-04-04 |
| 4584470 | Single-polarization fiber optics magnetic sensor | Hisao Iizuka | 1986-04-22 |
| 4500168 | Single polarization optical fibers | Toshihide Tokunaga, Junkichi Nakagawa | 1985-02-19 |
| 4493530 | Single polarization optical fibers | Toshihide Tokunaga, Junkichi Nakagawa | 1985-01-15 |