JD

Jean R. Dupain

📍 Châteauroux, FR: #78 of 227 inventorsTop 35%
Overall (All Time): #2,331,996 of 4,157,543Top 60%
2
Patents All Time

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
4849175 Apparatus for automatically determining certain characteristics of cement Christian Vernet 1989-07-18
4391774 Automatic device for making samples for analysis 1983-07-05