Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4927915 | Process for producing antistatic polymeric material | Saburo Hiraoka, Shinji Hama | 1990-05-22 |
| 4784910 | Method for giving electric conductivity to molded polymer article | Shoichi Nagai, Saburo Hiraoka, Shinji Hama | 1988-11-15 |
| 4659386 | Process for producing lightweight calcium silicate articles | Shoichi Nagai, Saburo Hiraoka, Shinji Hama | 1987-04-21 |