RM

Ralph D. Martin

AO Ashland Oil: 1 patents #154 of 284Top 55%
📍 Columbus, OH: #1,065 of 3,880 inventorsTop 30%
🗺 Ohio: #23,384 of 73,341 inventorsTop 35%
Overall (All Time): #1,640,184 of 4,157,543Top 40%
3
Patents All Time

Issued Patents All Time

Showing 1–3 of 3 patents

Patent #TitleCo-InventorsDate
5787664 Handrail assembly Mark Hollander 1998-08-04
4490999 Door lock with indicator Nial K. Castle, Derald E. Martin 1985-01-01
4293480 Urethane binder compositions for no-bake and cold box foundry application utilizing isocyanato-urethane polymers William R. Dunnavant, Gregory P. Sturtz, Heimo J. Langer 1981-10-06