Durward A. Hisey

HC Hyc Co.: 6 patents #2 of 6Top 35%

📍 Chesterfield, MO: #1,062 of 6,461 inventorsTop 20%

🗺 Missouri: #3,599 of 23,789 inventorsTop 20%

Overall (All Time): #895,206 of 4,157,543Top 25%

Patents All Time

Issued Patents All Time

Showing 1–6 of 6 patents

Patent #	Title	Co-Inventors	Date
D298500	Rack	—	1988-11-15
4697500	Adjustable chimney cap support	—	1987-10-06
4535686	Chimney cap	—	1985-08-20
4534280	Chimney cap	—	1985-08-13
D276543	Chimney cap	—	1984-11-27
4436021	Chimney cap	—	1984-03-13