DW

Donald F. Wilhlem

HC Helm Instrument Co.: 1 patents #5 of 10Top 50%
📍 Maumee, OH: #224 of 420 inventorsTop 55%
🗺 Ohio: #42,657 of 73,341 inventorsTop 60%
Overall (All Time): #3,869,689 of 4,157,543Top 95%
1
Patents All Time

Issued Patents All Time

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
4991850 Golf swing evaluation system — 1991-02-12