DH

Donald R. Hartwig

YM Yetter Manufacturing: 1 patents #1 of 2Top 50%
JD John Deere: 1 patents #28 of 169Top 20%
📍 Rock Island, IL: #1 of 9 inventorsTop 15%
🗺 Illinois: #289 of 3,813 inventorsTop 8%
Overall (1989): #28,873 of 140,708Top 25%
2
Patents 1989

Issued Patents 1989

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
4858698 Weight transfer linkage arrangement Gerald E. Williamson 1989-08-22
4796550 Single angled blade coulter and fertilizer opener Terry L. Van Natta 1989-01-10