Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5674313 | Rubber modified asphalt type of water-proofing composition | Tsuyoshi Aoyama, Yoshimasa Hayashi, Tadashi Nouchi, Kazuhiko Shichiku, Akira Ito +3 more | 1997-10-07 |
| 5597409 | Bituminous reinforcing material for grouting | Akira Ito | 1997-01-28 |