WP

William J. Platt

NM National Rolling Mills: 3 patents #1 of 2Top 50%
📍 Collingdale, PA: #1 of 2 inventorsTop 50%
🗺 Pennsylvania: #146 of 3,759 inventorsTop 4%
Overall (1989): #6,184 of 140,708Top 5%
3
Patents 1989

Issued Patents 1989

Showing 1–3 of 3 patents

Patent #TitleCo-InventorsDate
4864791 Fire strip — 1989-09-12
4827681 Interlocking cross tee — 1989-05-09
4794745 Tier drop grid system Paul C. Gillenwater 1989-01-03