Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6286818 | Internal members for mass transfer columns | — | 2001-09-11 |
| 5461761 | Process and apparatus for the production of expanded grids | Bruno Knopfli | 1995-10-31 |
| 4981265 | Liquid distributor for mass-transfer and heat-exchange columns | — | 1991-01-01 |
| 4501707 | Packing for material exchange columns | — | 1985-02-26 |