Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4498810 | Collapsible rubber dam | Tateo Muramatsu, Yasushi Enami | 1985-02-12 |
| 4335981 | Cargo handling equipment | Seiji Akiyama, Kazuhiko Ueki | 1982-06-22 |
| 4330224 | Collapsible rubber dam installation | Tateo Muramatsu | 1982-05-18 |
| 4329104 | Cargo handling apparatus | Seiji Akiyama, Kazuhiko Ueki | 1982-05-11 |
| 4299514 | Collapsible rubber dam | Tateo Muramatsu | 1981-11-10 |
| 4260285 | Oil boom | Kiyoshi Ezaki, Haruo Takahashi | 1981-04-07 |