YL

Yvonne Legras

SA Societe Nationale Elf Aquitaine: 2 patents #98 of 490Top 20%
Overall (All Time): #2,325,831 of 4,157,543Top 60%
2
Patents All Time

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
4952740 Cyclic phosphonites Sylvain Juge 1990-08-28
4694094 Cyclic diphosphonites Sylvain Juge 1987-09-15