Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5971401 | Ring seal for apertures of multi-shelled structures, especially of underground operation | Werner Floors | 1999-10-26 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5971401 | Ring seal for apertures of multi-shelled structures, especially of underground operation | Werner Floors | 1999-10-26 |