JL

Jean Leyer

UN Unknown: 4 patents #4,220 of 83,584Top 6%
VF V & M France: 1 patents #3 of 17Top 20%
VF Vallourec Oil And Gas France: 1 patents #75 of 144Top 55%
Overall (All Time): #2,010,650 of 4,157,543Top 50%
2
Patents All Time

Issued Patents All Time

Patent #TitleCo-InventorsDate
9394594 Low alloy steel with a high yield strength and high sulphide stress cracking resistance Christoph Bosch, Axel Kulgemeyer, Michel Piette 2016-07-19
9005520 Steel compositions for special uses Daniel Petelot, Bruno Vandenberghe, Viviane Lepingle, Ghislain Louis 2015-04-14