Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5838770 | Portable telephone system | Yutaka Fukushima, Tetsuo Takemura, Shinichi Iwaki, Masao Wanami, Isao Shimbo +8 more | 1998-11-17 |
| 5579370 | Portable telephone system | Yutaka Fukushima, Tetsuo Takemura, Shinichi Iwaki, Masao Wanami, Isao Shimbo +8 more | 1996-11-26 |