DD

Donald F. Dengel

📍 Fond du Lac, WI: #142 of 383 inventorsTop 40%
🗺 Wisconsin: #13,258 of 40,088 inventorsTop 35%
Overall (All Time): #1,640,533 of 4,157,543Top 40%
3
Patents All Time

Issued Patents All Time

Showing 1–3 of 3 patents

Patent #TitleCo-InventorsDate
5799774 Wallet key holder — 1998-09-01
4901549 Key retainer — 1990-02-20
4785645 Key retainer — 1988-11-22