PH

Per C. Hansen

DW Dyckerhoff & Widmann: 1 patents #32 of 81Top 40%
Overall (All Time): #3,944,807 of 4,157,543Top 95%
1
Patents All Time

Issued Patents All Time

Patent #TitleCo-InventorsDate
4718209 Wedge anchorage for a tension member in a prestressed concrete structure Gero Herrmann 1988-01-12