Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6508982 | Air-cleaning apparatus and air-cleaning method | — | 2003-01-21 |
| 5199995 | Compounds for removing iron rust scales from water pipes and method therefor | Kishio Shoji | 1993-04-06 |
| 4396913 | Electrochromic display device | Takashi Aoyama, Rikusei Kohara | 1983-08-02 |
| 4326777 | Electrochromic display device | Rikusei Kohara, Susumu Kakumoto, Takashi Aoyama, Mutsuaki Shinagawa | 1982-04-27 |