Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4267853 | Self-closing gas pipes and pipe joints | Yukio Yamaguchi, Kenji ISHIHARA | 1981-05-19 |
| 4229341 | Method of making thermally expansible rubber tubes for use in self-closing gas pipes and pipe joints | Yukio Yamaguchi, Kenji ISHIHARA | 1980-10-21 |