JH

John C. Helfrick

HP HP: 1 patents #8,774 of 16,619Top 55%
📍 San Diego, CA: #15,630 of 23,606 inventorsTop 70%
🗺 California: #247,236 of 386,348 inventorsTop 65%
Overall (All Time): #3,069,364 of 4,157,543Top 75%
1
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Issued Patents All Time

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
9127407 Sizing composition Steven L. Webb, John L. Stoffel, Silke Courtenay 2015-09-08