Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5935297 | Method for operating an alternating pressure apparatus for producing oxygen from the air | — | 1999-08-10 |
| 5928407 | Alternating pressure apparatus for obtaining oxygen from the air and method for the operation thereof | — | 1999-07-27 |
| 5595477 | Vacuum pumping stand | — | 1997-01-21 |
| 4838912 | Method and apparatus for the purification and recirculation of gases | — | 1989-06-13 |
| 4752450 | Apparatus for cleaning sulphur and nitrogen containing flue gas | Walter Dietrich | 1988-06-21 |
| 4629407 | Apparatus for the manufacture of metal powder by atomization from a nozzle with noble gas or nitrogen | — | 1986-12-16 |