Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4888745 | Apparatus for marking individual points of an underwater construction | Karl G. Walther | 1989-12-19 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4888745 | Apparatus for marking individual points of an underwater construction | Karl G. Walther | 1989-12-19 |