HB

Hans-Helmut Borggrefe

Overall (All Time): #4,071,767 of 4,157,543Top 100%
1
Patents All Time

Issued Patents All Time

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
4336218 Method for recovering residual matter accumulated in the production and machining of steel Werner Kaas, Klaus Unger 1982-06-22