Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5650369 | Catalysts used for producing carbonic acid esters and methods of producing carbonic acid esters using the same | Masao Tonosaki, Nobuhiro Yamada, Kenji Mori | 1997-07-22 |
| 5640632 | Viewfinder device | Shouichi Yamazaki | 1997-06-17 |