William E. Douglas

📍 Johnstown, PA: #58 of 214 inventorsTop 30%

🗺 Pennsylvania: #23,606 of 74,527 inventorsTop 35%

Overall (All Time): #1,625,619 of 4,157,543Top 40%

Patents All Time

Issued Patents All Time

Showing 1–3 of 3 patents

Patent #	Title	Co-Inventors	Date
6331025	Barrier lifter	—	2001-12-18
6012752	Concrete pipe lifting apparatus	—	2000-01-11
5661474	Highway work zone intrusion alarm system	—	1997-08-26