WL

Werner Leuthold

AF A. W. Faber-Castell: 2 patents #4 of 17Top 25%
Overall (All Time): #2,368,091 of 4,157,543Top 60%
2
Patents All Time

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
4352581 Mechanical pencil Svatopluk Krumnikl, Gunther Babel 1982-10-05
4247215 Mechanical pencil Svatopluk Krumnikl, Gunther Babel 1981-01-27