Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5179227 | Fractionation process of reaction mixture containing methylene bridged polyphenylene polyisocyanate | Noritoshi Ishida, Zunzi Tashima, Mitsunori Shimamatsu, Kazunari Nitta | 1993-01-12 |
| 5053539 | Methylene-crosslinked polyarylamine and process for preparing same | Naoyuki Yano, Tatsuya Nagayoshi, Zunzi Tashima, Noritoshi Ishida, Hiroyuki Itoh +1 more | 1991-10-01 |