JK

John Daniel Kempton

UN Unknown: 1 patents #29,356 of 83,584Top 40%
📍 El Sobrante, CA: #82 of 144 inventorsTop 60%
🗺 California: #247,236 of 386,348 inventorsTop 65%
Overall (All Time): #3,692,680 of 4,157,543Top 90%
1
Patents All Time

Issued Patents All Time

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
5791438 Adjustable platform for supporting ladders — 1998-08-11