John P. Callahan

📍 Mentor, OH: #5 of 44 inventorsTop 15%

🗺 Ohio: #2,196 of 7,190 inventorsTop 35%

Overall (2022): #399,905 of 548,613Top 75%

Patents 2022

Issued Patents 2022

Showing 1–1 of 1 patents

Patent #	Title	Co-Inventors	Date
11326503	Portable exhaust removal system	—	2022-05-10