DC

David F. Creffield

DP Double A Products: 1 patents #5 of 8Top 65%
📍 Marquette, MI: #100 of 177 inventorsTop 60%
🗺 Michigan: #49,615 of 86,293 inventorsTop 60%
Overall (All Time): #4,041,749 of 4,157,543Top 100%
1
Patents All Time

Issued Patents All Time

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
4474104 Control system for variable displacement pumps and motors — 1984-10-02