FH

Frank D. Helman

📍 Elkhart, IN: #14 of 55 inventorsTop 30%
🗺 Indiana: #228 of 1,070 inventorsTop 25%
Overall (1982): #17,958 of 81,411Top 25%
1
Patents 1982

Issued Patents 1982

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
4341008 Method of registering a steel rule die and counterplate Herman Graboyes 1982-07-27