HH

Hanh P. Hellenguard

EA E.I. Du Pont De Nemours And: 1 patents #4,343 of 8,010Top 55%
🗺 Virginia: #18,729 of 34,511 inventorsTop 55%
Overall (All Time): #3,890,751 of 4,157,543Top 95%
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Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
5068796 Control of sheet opacity Lawrence J. Koth, Donald T. Vaughan 1991-11-26