Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4888033 | Method of manufacturing permeable mineral membranes | Jean Charpin, Andre Grangeon, Francis Pejot, Bernard Rasneur, Serge Richard +1 more | 1989-12-19 |
PP
Pierre Plurien
Overall (1989): #68,417 of 140,708Top 50%
1
Patents 1989