Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4882035 | Process for improving the deshafting of a heavy hydrocarbon feedstock | Pierre Maroy, Gilles Trinquet | 1989-11-21 |
| 4848446 | Device for maintaining in position one end of an element mounted for rotational motion in a tube, and use thereof | David Freychet | 1989-07-18 |