RS

Robert Spengler

📍 Billerica, MA: #287 of 621 inventorsTop 50%
🗺 Massachusetts: #42,150 of 88,656 inventorsTop 50%
Overall (All Time): #2,157,480 of 4,157,543Top 55%
2
Patents All Time

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
7216742 Ladder stabilizers — 2007-05-15
D353308 Shovel Paul Spengler 1994-12-13