JK

Joannes Henricus Maria de Kroon

UN Unknown: 1 patents #29,356 of 83,584Top 40%
📍 Elburg, NL: #4 of 11 inventorsTop 40%
Overall (All Time): #3,352,006 of 4,157,543Top 85%
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Issued Patents All Time

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
7350863 Height-adjustable work chair Paul Arthur Engels, Gaston Lionel van Amerongen 2008-04-01