Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4875313 | Device for suppressing vibration of structure | — | 1989-10-24 |
| 4873798 | Apparatus for suppressing vibration of structure | — | 1989-10-17 |
| 4864797 | Concrete filled tube column and method of constructing same | Yasushi Watanabe, Yasukazu Nakamura, Yutaka Saito | 1989-09-12 |