Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5498409 | Material for adsorbing pyrogen | Chuichi Hirayama, Keijun Hiraoka | 1996-03-12 |
| 5401499 | Method of adsorbing pyrogens | Chuichi Hirayama, Keijun Hiraoka | 1995-03-28 |
| 4981515 | High functional regenerated cellulose composition | Keijun Hiraoka, Itaru Kimura | 1991-01-01 |