Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4767834 | Vinyl benzyl 2,2,6,6-tetramethyl piperidines | William E. Leistner, Yutaka Nakahara, Bunji Hirai | 1988-08-30 |
| 4707507 | 2,2,6,6-tetramethyl quaternary ammonium halides and synthetic resin and stabilizer compositions | Mitsuo Akutsu | 1987-11-17 |
| 4692485 | Vinyl benzyl 2,2,6,6-tetramethyl piperidines | William E. Leistner, Yutaka Nakahara, Bunji Hirai | 1987-09-08 |