Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6274251 | Semiconductor encapsulating epoxy resin composition and semiconductor device | Kenji Ohashi, Tatsuya Ishizaki, Eiichi Asano, Kazutoshi Tomiyoshi, Shoichi Osada +1 more | 2001-08-14 |
| 6168872 | Semiconductor encapsulating epoxy resin composition and semiconductor device | Kenji Ohashi, Tatsuya Ishizaki, Eiichi Asano, Shoichi Osada, Kazutoshi Tomiyoshi +1 more | 2001-01-02 |
| 4761493 | Preparation process of quaternary phosphonium hydroxide | Satoshi Takita | 1988-08-02 |
| 4613373 | Tetraarylboron-ammonium complexes and their uses | Akitomo Wakabayashi, Kazuo Tomozane, Sumio Wakabayashi, Hitoshi Okamoto, Junji Yokoi | 1986-09-23 |