Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4541847 | Air-purifying apparatus | Hiromichi Koyama, Takafumi Takegawa | 1985-09-17 |
| 4213679 | Projector | Kiyoshi Sakamoto, Yukio Tsukakoshi | 1980-07-22 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4541847 | Air-purifying apparatus | Hiromichi Koyama, Takafumi Takegawa | 1985-09-17 |
| 4213679 | Projector | Kiyoshi Sakamoto, Yukio Tsukakoshi | 1980-07-22 |