HL

Helmut Landgraf

MA Mannesmann Ag: 4 patents #114 of 1,341Top 9%
📍 Uerdingen, DE: #23 of 53 inventorsTop 45%
Overall (All Time): #1,307,475 of 4,157,543Top 35%
4
Patents All Time

Issued Patents All Time

Showing 1–4 of 4 patents

Patent #TitleCo-InventorsDate
4519863 Method and device for jacketing a steel pipe with several plastic materials Walter Stucke 1985-05-28
4501632 Wrapping steel pipes in a thermoplastic ribbon 1985-02-26
4386996 Apparatus for the jacketing of steel pipes Walter Stucke 1983-06-07
4184839 Roller track for pipes Klaus-Ulrich Lange 1980-01-22