Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4443016 | Clamp ring device for the securing and removal of a cover over a pressure vessel | — | 1984-04-17 |
| 4224843 | Tensioning device for simultaneously tensioning a plurality of bolts | Siegfried Heiermann, Hans Lachner, Jörg Richter, Kurt Togel, Hans Warnke | 1980-09-30 |