Issued Patents All Time
Showing 1–13 of 13 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10968882 | Movable-blade operation system for hydraulic machine | Junji Mori, Masahiko Nakazono, Ryoji Hakataya, Kouya Inada | 2021-04-06 |
| 6005774 | Integrated circuit card | Kazuo Chiba, Masakatsu Ozawa | 1999-12-21 |
| 5936258 | Optical semiconductor memory device and read/write method therefor | Shun-ichi Muto, Naoto Horiguchi, Yoshihiro Sugiyama, Yoshiaki Nakata | 1999-08-10 |
| 5889296 | Semiconductor optical device and an optical processing system that uses such a semiconductor optical system | Naoki Yokoyama | 1999-03-30 |
| 5677551 | Semiconductor optical device and an optical processing system that uses such a semiconductor optical system | Naoki Yokoyama | 1997-10-14 |
| 5561306 | Hetero-bipolar transistor having a plurality of emitters | Motomu Takatsu, Toshihiko Mori | 1996-10-01 |
| 5432356 | Semiconductor heterojunction floating layer memory device and method for storing information in the same | — | 1995-07-11 |
| 5389804 | Resonant-tunneling heterojunction bipolar transistor device | Naoki Yokoyama | 1995-02-14 |
| 5214297 | High-speed semiconductor device | Naoki Yokoyama, Toshio Ohshima | 1993-05-25 |
| 5151618 | Resonant-tunneling heterojunction bipolar transistor device | Naoki Yokoyama | 1992-09-29 |
| 5031005 | Semiconductor device | Toshiro Futatsugi, Naoki Yokoyama | 1991-07-09 |
| 5027179 | Resonant-tunneling heterojunction bipolar transistor device | Naoki Yokoyama | 1991-06-25 |
| 4868418 | Comparator circuit using resonant-tunneling transistor | Masao Taguchi | 1989-09-19 |