RD

Robert A. Duval

📍 Fitchburg, MA: #44 of 131 inventorsTop 35%
🗺 Massachusetts: #42,150 of 88,656 inventorsTop 50%
Overall (All Time): #2,308,302 of 4,157,543Top 60%
2
Patents All Time

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
5168734 Re-combinate removable plug lock Merrill A. Dana 1992-12-08
5101649 Key-operable lock with removable plug — 1992-04-07