Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5455632 | Television signal processing circuit for simultaneously displaying a sub-picture in a main-picture | — | 1995-10-03 |
| 4746332 | Process for producing high purity nitrogen | Masaomi Tomomura, Tetsuro Haga, Shunsuke Nogita, Takazumi Ishizu | 1988-05-24 |
| 4704139 | Method and apparatus for separating gases | Akio Yamamoto, Takazumi Ishizu | 1987-11-03 |