Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9869106 | Concrete construction of modular design | Christian Keindorf, Dirk Wagner, Peter Lenzing | 2018-01-16 |
| 8950149 | Concrete structure | — | 2015-02-10 |
| 6571398 | Transit positioning device for use with manhole mount | Joseph Stahl | 2003-06-03 |