Harlan J. Demers

KO Koppers: 3 patents #12 of 126Top 10%

📍 Marshallville, OH: #6 of 23 inventorsTop 30%

🗺 Ohio: #23,384 of 73,341 inventorsTop 35%

Overall (All Time): #1,673,208 of 4,157,543Top 45%

Patents All Time

Issued Patents All Time

Showing 1–3 of 3 patents

Patent #	Title	Co-Inventors	Date
4742663	Concealed load distribution means for wooden beams	—	1988-05-10
4679658	Gaff	—	1987-07-14
4299511	Connector and imperforate reinforcement plates in combination	—	1981-11-10