DK

Darryl F. Klassen

3M: 3 patents #4,214 of 11,543Top 40%
Overall (All Time): #1,539,937 of 4,157,543Top 40%
3
Patents All Time

Issued Patents All Time

Showing 1–3 of 3 patents

Patent #TitleCo-InventorsDate
8388717 Furnace filter adapters and braces David E. Livingstone, David Beckett 2013-03-05
7179480 Sustained release microcapsules 2007-02-20
6540991 Stabilized active materials David J. Muir 2003-04-01