Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4889312 | Waterstop for concrete form separator | Shigemichi Ishii, Sadaaki Tagomori, Takuo Fukushima, Yasumasa Hayashida | 1989-12-26 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4889312 | Waterstop for concrete form separator | Shigemichi Ishii, Sadaaki Tagomori, Takuo Fukushima, Yasumasa Hayashida | 1989-12-26 |