DK

David Kersjes

HS Harbor Steel & Supply: 3 patents #1 of 7Top 15%
📍 Grand Rapids, MI: #536 of 1,824 inventorsTop 30%
🗺 Michigan: #27,158 of 86,293 inventorsTop 35%
Overall (All Time): #1,607,271 of 4,157,543Top 40%
3
Patents All Time

Issued Patents All Time

Showing 1–3 of 3 patents

Patent #TitleCo-InventorsDate
6830159 File cabinet container Robert Caldwell, Charles B. Carter, Gardner Klaasen 2004-12-14
6588865 Carrousel file cabinet Robert Caldwell, Charles B. Carter, Gardner Klaasen, David Swenson 2003-07-08
6419332 File cabinet Robert Caldwell, Charles B. Carter, Gardner Klaasen 2002-07-16