Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4899277 | Bore hole scanner with position detecting device and light polarizers | Takashi Ishii, Yoshihiro Mukawa, Kouji Nagata, Yoshitaka Matsumoto, Osamu Murakami | 1990-02-06 |
| 4779201 | Borehole scanner and sonde position locator for spectral analysis of wall | Takashi Ishii, Yoshitaka Matsumoto, Koji Noguchi | 1988-10-18 |