DL

Dirk Laan

📍 Oosterbeek, NL: #16 of 67 inventorsTop 25%
Overall (All Time): #2,344,980 of 4,157,543Top 60%
2
Patents All Time

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
4698366 Method for the manufacture of insulating porous shaped building articles — 1987-10-06
4452636 Building elements containing cement and spheres of expanded, porous foamed resin — 1984-06-05