Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5044835 | Expansion joint for use in constructing concrete structures | Takuo Fukushima, Hiroshi Inoue, Makio Takahashi | 1991-09-03 |
| 4905429 | Device for filling up of recess left in concrete wall after removal | Takuo Fukushima, Hiroto Gomi, Kuniharu Kikuma | 1990-03-06 |
| 4889312 | Waterstop for concrete form separator | Sunoo Ogou, Shigemichi Ishii, Sadaaki Tagomori, Takuo Fukushima | 1989-12-26 |
| 4816509 | Water swellable sealant | Takuo Fukushima, Jinichi Omi | 1989-03-28 |