JF

John P. Fromberg

📍 Covina, CA: #137 of 287 inventorsTop 50%
🗺 California: #247,236 of 386,348 inventorsTop 65%
Overall (All Time): #3,986,839 of 4,157,543Top 100%
1
Patents All Time

Issued Patents All Time

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
4711461 Three-axis trailer hitch having improved rotatable coupling between vehicle and trailer — 1987-12-08