JH

John A. Helmsderfer

📍 East Liverpool, OH: #1 of 3 inventorsTop 35%
🗺 Ohio: #979 of 4,093 inventorsTop 25%
Overall (1994): #113,993 of 165,921Top 70%
1
Patents 1994

Issued Patents 1994

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
5341830 Cover assembly and method for covering undersink piping T. Michael McRoberts 1994-08-30