HL

Hendrik Langejan

IN Ihc Holland N.V.: 2 patents #9 of 34Top 30%
📍 Krimpen aan den IJssel, NL: #14 of 38 inventorsTop 40%
Overall (All Time): #2,341,075 of 4,157,543Top 60%
2
Patents All Time

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
4644888 Floating hopper barge with discharging trap doors in the bottom — 1987-02-24
4502405 Floating device comprising storage holds for bulk freight, such as a hopper dredge — 1985-03-05