RH

Roger A. Hayes

📍 Tigard, OR: #430 of 696 inventorsTop 65%
🗺 Oregon: #17,068 of 28,073 inventorsTop 65%
Overall (All Time): #4,123,090 of 4,157,543Top 100%
1
Patents All Time

Issued Patents All Time

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
4231664 Method and apparatus for combining high speed horizontal and high speed vertical continuous mixing of chemically bonded foundry sand Steven D. Flock 1980-11-04