Albert S. Janni

DR Duro-Last Roofing: 2 patents #2 of 4Top 50%

📍 Saginaw, MI: #247 of 671 inventorsTop 40%

🗺 Michigan: #35,034 of 86,293 inventorsTop 45%

Overall (All Time): #2,328,062 of 4,157,543Top 60%

Patents All Time

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #	Title	Co-Inventors	Date
4872296	Corner pieces for single-ply polymer-coated fabric core roof membranes and the product thereby formed	—	1989-10-10
4799986	Method of fabricating polymer-coated fabric outside corner pieces for single-ply polymer-coated fabric core roof membranes	—	1989-01-24