WH

William N. Helm

Overall (All Time): #1,675,452 of 4,157,543Top 45%
3
Patents All Time

Issued Patents All Time

Patent #TitleCo-InventorsDate
4665929 Axial flow combine harvester feed plate 1987-05-19
4657029 Stone trap for a combine harvester David G. Link 1987-04-14
4542785 Agricultural harvester heat exchanger Ralph Bagnall 1985-09-24