Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4940802 | 4,4'-bis(phthalimido)diphenyl sulfone compounds, processes for their production and flame retardant polymer compositions containing them | Takao Matsuba, Masashige Kubo, Takumi Kagawa, Kiyotaka Oyama | 1990-07-10 |
| 4760211 | Process for producing brominated acenaphthylene and its condensates | Masahige Kubo, Yukihiro Tsutsumi | 1988-07-26 |