Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5301927 | Method of making concrete switch cross ties | — | 1994-04-12 |
| 5227112 | Method of making concrete switch cross ties | — | 1993-07-13 |
| 5196209 | Making a prestressed concrete beam | — | 1993-03-23 |
| 5127160 | Method of fastening construction components in a casing for series-produced finished parts | — | 1992-07-07 |
| 5124093 | Process for the production of concrete switch cross ties | — | 1992-06-23 |
| 4948089 | Concrete mold with arrangement for mounting tubular components | Rolf Knodel, Wolfgang Bergenthal, Thomas Zander | 1990-08-14 |