Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4872787 | Method of drilling printed circuit board | Kunio Arai, Hiromi Nishiyama, Hiroshi Aoyama | 1989-10-10 |
| 4867297 | Board exchanging apparatus | Kunio Saitoh, Tamio Ohtani | 1989-09-19 |