RH

Richard L. Helferich

TC The Duriron Company: 1 patents #1 of 4Top 25%
📍 Clayton, OH: #2 of 2 inventorsTop 100%
🗺 Ohio: #490 of 2,550 inventorsTop 20%
Overall (1982): #36,569 of 81,411Top 45%
1
Patents 1982

Issued Patents 1982

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
4357165 Aluminosilicate hydrogel bonded granular compositions and method of preparing same William B. Shook 1982-11-02