RW

Robert Warthmann

📍 Volketswil, CH: #27 of 69 inventorsTop 40%
Overall (All Time): #2,319,085 of 4,157,543Top 60%
2
Patents All Time

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
5051024 Sliding closures for roadway expansion joints — 1991-09-24
4401497 Method and apparatus for butt welding of plastic pipes of large diameter — 1983-08-30