RS

Richard David Spencer

📍 O'Fallon, IL: #37 of 95 inventorsTop 40%
🗺 Illinois: #34,584 of 84,256 inventorsTop 45%
Overall (All Time): #1,969,850 of 4,157,543Top 50%
2
Patents All Time

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
D835899 Umbrella handle David M. Hines, Shaun Kjellman, Zanfirescu Iulian-Alin 2018-12-18
8733503 Safety attachment for ladder — 2014-05-27