Craig N. Hansen

HE Hansen Engine: 1 patents #1 of 2Top 50%

📍 Sioux Falls, SD: #3 of 15 inventorsTop 20%

🗺 South Dakota: #8 of 62 inventorsTop 15%

Overall (1989): #124,364 of 140,708Top 90%

Patents 1989

Issued Patents 1989

Showing 1–1 of 1 patents

Patent #	Title	Co-Inventors	Date
4813392	Rotary valve assembly	Paul C. Cross	1989-03-21