Issued Patents All Time
Showing 1–23 of 23 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12404201 | Preform for optical fiber and manufacturing method of optical fiber | Qiuyue Piao, Yusuke Kinoshita | 2025-09-02 |
| 11067755 | Optical fiber module and method for manufacturing the same | Jun Yamamoto, Takashi Kato, Youichi Sakakibara, Yuki Atsumi, Tomoya Yoshida | 2021-07-20 |
| D879767 | Optical communication module | Takashi Kato | 2020-03-31 |
| D879768 | Optical communication module | Takashi Kato | 2020-03-31 |
| 10187175 | Optical multiplexer/demultiplexer and optical transceiver | Takashi Kato, Hiroaki Ono | 2019-01-22 |
| 9821381 | Gaseous fuel supply apparatus for sintering machine | Yuji IWAMI, Koichi Nushiro | 2017-11-21 |
| 7551343 | Magneto-optical device and manufacturing method thereof | Hiromitsu Umezawa | 2009-06-23 |
| 6837916 | Smelting reduction method | Masahiro Kawakami, Terutoshi Sawada, Takeshi Sekiguchi, Masayuki Watanabe, Shinichi Isozaki +1 more | 2005-01-04 |
| 5074530 | Apparatus for smelting reduction of iron ore | Kenji Takahashi, Shigeru Inoue, Haruyoshi Tanabe, Masahiro Kawakami, Osamu Terada | 1991-12-24 |
| 5065985 | Method for smelting reduction of iron ore and apparatus therefor | Kenji Takahashi, Shigeru Inoue, Haruyoshi Tanabe, Masahiro Kawakami, Kenzo Yamada +1 more | 1991-11-19 |
| 5047081 | Method of decarburizing high chromium molten metal | Haruyoshi Tanabe, Masahiro Kawakami, Kenji Takahashi, Shigeru Inoue | 1991-09-10 |
| 5047082 | Method for smelting reduction of Ni ore | Haruyoshi Tanabe, Masahiro Kawakami, Chihiro Taki, Toshio Takaoka | 1991-09-10 |
| 5039480 | Method for manufacturing molten metal containing Ni and Cr | Haruyoshi Tanabe, Chihiro Taki, Masahiro Kawakami, Toshio Takaoka | 1991-08-13 |
| 5017220 | Method for smelting reduction of Ni ore | Haruyoshi Tanabe, Masahiro Kawakami, Chihiro Taki, Toshio Takaoka | 1991-05-21 |
| 5000784 | Method for smelting reduction of iron ore | Kenji Takahashi, Shigeru Inoue, Haruyoshi Tanabe, Masahiro Kawakami, Kenzo Yamada +1 more | 1991-03-19 |
| 4995906 | Method for smelting reduction of iron ore | Kenji Takahashi, Shigeru Inoue, Haruyoshi Tanabe, Masahiro Kawakami, Osamu Terada | 1991-02-26 |
| 4988079 | Apparatus for smelting and reducing iron ores | Kenji Takahashi, Shigeru Inoue, Haruyoshi Tanabe, Masahiro Kawakami, Kenzo Yamada +1 more | 1991-01-29 |
| 4961784 | Method of smelting reduction of chromium raw materials and a smelting reduction furnace thereof | Haruyoshi Tanabe, Masahiro Kawakami, Kenji Takahashi, Shigeru Inoue | 1990-10-09 |
| 4944799 | Method of producing stainless molten steel by smelting reduction | Haruyoshi Tanabe, Masahiro Kawakami, Kenji Takahashi, Shigeru Inoue | 1990-07-31 |
| 4936908 | Method for smelting and reducing iron ores | Kenji Takahashi, Shigeru Inoue, Haruyoshi Tanabe, Masahiro Kawakami, Kenzo Yamada +1 more | 1990-06-26 |
| 4935054 | Method of charging chromium ores in a smelting reduction | Haruyoshi Tanabe, Masahiro Kawakami, Kenji Takahashi, Shigeru Inoue, Hitoshi Kawata | 1990-06-19 |
| 4792352 | Method for manufacturing steel through smelting reduction | Akichika Ozeki, Kenzo Yamada | 1988-12-20 |
| 4601749 | Method for adjusting chemical composition of molten pig iron tapped from blast furnace | Kenzo Yamada, Mitsuru Ohtsuki, Haruo Ito | 1986-07-22 |