JH

John A. Heffner

📍 Clarksburg, CA: #3 of 9 inventorsTop 35%
🗺 California: #247,236 of 386,348 inventorsTop 65%
Overall (All Time): #2,867,179 of 4,157,543Top 70%
1
Patents All Time

Issued Patents All Time

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
10344434 Detectable warnings Kenneth Szekely, David N. Sambrook 2019-07-09