Keith B. Risser

📍 Columbia, MD: #594 of 1,501 inventorsTop 40%

🗺 Maryland: #13,387 of 35,612 inventorsTop 40%

Overall (All Time): #2,213,645 of 4,157,543Top 55%

Patents All Time

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #	Title	Co-Inventors	Date
6415571	Sub-deck drainage system or gutter comprising a trapezoidal shaped panel of thermoset, thermoplastic, or modified bitumen membrane	—	2002-07-09
6385931	Fire retardant deck waterproof system	—	2002-05-14