Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4852736 | Metal case for housing an IC and a manufacturing method therefor | Masayasu Kojima | 1989-08-01 |
| 4827750 | Method of piercing and manufacturing seamless tubes | — | 1989-05-09 |