DH

Douglas A. Hillen

📍 Dallas, TX: #4,358 of 7,543 inventorsTop 60%
🗺 Texas: #73,555 of 125,132 inventorsTop 60%
Overall (All Time): #4,048,941 of 4,157,543Top 100%
1
Patents All Time

Issued Patents All Time

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
4374534 Turbine ventilator cover Victor H. Jespers 1983-02-22