Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6987201 | Acetic anhydride, method of purifying crude acetic anhydride, and method of producing polyoxytetramethylene glycol using acetic anhydride | Ryosuke Maeda, Toshifumi Fukui, Mitsuru Yamashita | 2006-01-17 |
| 5590399 | Up-link channel assignment scheme for cellular mobile communications systems employing multi-beam antennas with beam selection | Tadashi Matsumoto | 1996-12-31 |