Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5224802 | Method and apparatus for controlling the infeed of air into the conveyor conduit of a pneumatic conveyor installation | Bernd Federhen | 1993-07-06 |
| 5082024 | Valve assembly including a hollow conduit | Bernd Federhen | 1992-01-21 |
| 4955761 | Process for pneumatically conveying material and apparatus for controlling the feed of air therefor | Bernd Federhen | 1990-09-11 |
| 4850751 | Method and apparatus for introducing bulk material into a pneumatic conveyor conduit | Bernd Federhen | 1989-07-25 |
| 4674922 | Apparatus and process for controlling a charging operation for a feed of particles of bulk material | Bernd Federhen, Gerhard Muller-Spath | 1987-06-23 |