CA

Christopher A. Armstrong

DI Ductmate Industries: 2 patents #7 of 19Top 40%
📍 Masontown, PA: #64 of 171 inventorsTop 40%
🗺 Pennsylvania: #30,495 of 74,527 inventorsTop 45%
Overall (All Time): #2,032,085 of 4,157,543Top 50%
2
Patents All Time

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
9074709 Process for manufacturing sealed round metal ductwork Vincent L. Bloom, Douglas G. Gudenburr, Andrew J. Male 2015-07-07
7992904 Sealing mechanism for ductwork Vincent L. Bloom, Douglas G. Gudenburr, Andrew J. Male 2011-08-09