FH

Frank F. Helton

📍 Chesterfield, MO: #40 of 244 inventorsTop 20%
🗺 Missouri: #150 of 859 inventorsTop 20%
Overall (1989): #137,353 of 140,708Top 100%
1
Patents 1989

Issued Patents 1989

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
4804899 Antenna rotator controllers and conversion systems therefor Gerard A. Wurdack 1989-02-14