MZ

Mark Zellefrow

OI Ohio Steel Industries: 2 patents #12 of 20Top 60%
📍 Columbus, OH: #1,440 of 3,880 inventorsTop 40%
🗺 Ohio: #30,338 of 73,341 inventorsTop 45%
Overall (All Time): #2,140,111 of 4,157,543Top 55%
2
Patents All Time

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
7610646 Lawn sweeper Joseph Chattin, Richard Biggs 2009-11-03
D473691 Shopping cart Paul P. Kolada, Rodger Hays 2003-04-22