JH

James C. Helfrich

📍 Fredericktown, OH: #1 of 2 inventorsTop 50%
🗺 Ohio: #1,400 of 5,375 inventorsTop 30%
Overall (2004): #201,244 of 270,089Top 75%
1
Patents 2004

Issued Patents 2004

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
6824348 Wind rotor operable in slow wind speeds Barton D. Alexander 2004-11-30