DH

David L. Hopkins

TL The Lubrizol: 2 patents #275 of 659Top 45%
📍 Mentor, OH: #289 of 709 inventorsTop 45%
🗺 Ohio: #30,338 of 73,341 inventorsTop 45%
Overall (All Time): #2,316,638 of 4,157,543Top 60%
2
Patents All Time

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
5017230 Asphalt additive compositions John S. Perz 1991-05-21
4836857 Asphalt additive compositions — 1989-06-06