Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4812897 | Semiconductor element sealing structure | Ryoichi Narita, Toshio Sonobe, Junji Ishikawa, Osamu Takenaka, Junji Sugiura | 1989-03-14 |
| 4804726 | Manufacturing method of polyolefin | Yozo Kondo, Mitsuhiro Mori, Morihiko Sato, Toshikazu Chikusa | 1989-02-14 |