John H. Grady

PS Phillips Screw: 2 patents #6 of 11Top 55%

📍 Wayland, MA: #315 of 613 inventorsTop 55%

🗺 Massachusetts: #42,150 of 88,656 inventorsTop 50%

Overall (All Time): #2,301,286 of 4,157,543Top 60%

Patents All Time

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #	Title	Co-Inventors	Date
5203742	Punch for making such screw heads with slant rib	—	1993-04-20
5120173	Screw head with slant rib	—	1992-06-09