Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4277047 | Metallic sealing device for valve | — | 1981-07-07 |
| 4272054 | Fire-safe sealing device for valve | — | 1981-06-09 |
| 4258901 | Valve sealing device | Takeshi Okayasu | 1981-03-31 |
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4277047 | Metallic sealing device for valve | — | 1981-07-07 |
| 4272054 | Fire-safe sealing device for valve | — | 1981-06-09 |
| 4258901 | Valve sealing device | Takeshi Okayasu | 1981-03-31 |