PS

Petrus A. M. Spierings

📍 Boston, MA: #2,667 of 5,993 inventorsTop 45%
🗺 Massachusetts: #42,150 of 88,656 inventorsTop 50%
Overall (All Time): #2,313,173 of 4,157,543Top 60%
2
Patents All Time

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
5173069 Autorotative flyer Mark A. Litos 1992-12-22
4679848 Back support mechanism and method — 1987-07-14