DK

Donald E. Koehler

📍 Mentor, OH: #289 of 709 inventorsTop 45%
🗺 Ohio: #30,338 of 73,341 inventorsTop 45%
Overall (All Time): #2,253,450 of 4,157,543Top 55%
2
Patents All Time

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
5962738 Polymeric-amine fuel and lubricant additive William J. Claffey 1999-10-05
5559270 Method of synthesizing pure additives and the improved compositions thereby produced William J. Claffey 1996-09-24