Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4676694 | Process and installation for the congelation of grounds by means of a cryogenic liquid | Pierre Karinthi, Maurice Gardent, Colette Regnier | 1987-06-30 |
| 4607488 | Ground congelation process and installation | Pierre Karinthi, Maurice Gardent, Colette Regnier | 1986-08-26 |