Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4808039 | Coupling mechanism for interconnecting sealing plates that are to be built into a sealing wall | — | 1989-02-28 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4808039 | Coupling mechanism for interconnecting sealing plates that are to be built into a sealing wall | — | 1989-02-28 |