DH

Douglas J. Herrick

📍 Poynette, WI: #9 of 30 inventorsTop 30%
🗺 Wisconsin: #13,258 of 40,088 inventorsTop 35%
Overall (All Time): #1,650,187 of 4,157,543Top 40%
3
Patents All Time

Issued Patents All Time

Showing 1–3 of 3 patents

Patent #TitleCo-InventorsDate
D356763 Locking hitch-pin for trailer — 1995-03-28
5395131 Anti-theft hitch ball — 1995-03-07
5271449 Detachable barrier for a doorway — 1993-12-21