Issued Patents 1997
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5662142 | Valve flapper with bands of different deflectibility | — | 1997-09-02 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5662142 | Valve flapper with bands of different deflectibility | — | 1997-09-02 |