William E. Perk

📍 Cleveland, OH: #637 of 1,781 inventorsTop 40%

🗺 Ohio: #30,338 of 73,341 inventorsTop 45%

Overall (All Time): #2,343,855 of 4,157,543Top 60%

Patents All Time

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #	Title	Co-Inventors	Date
4680910	Hollow-louvered ceilings	—	1987-07-21
4532749	Louvered ceiling	—	1985-08-06