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USPTO Patent Rankings Data through Dec 31, 2025
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Norbert Topf — 2 Patents

UNUnknown: 2 patents #12,644 of 83,584Top 20%
Dresden, DE: #1,100 of 3,254 inventorsTop 35%
Overall (All Time): #1,709,992 of 4,157,543Top 45%
2 Patents All Time
Norbert Topf has been granted 2 US patents while listed as an inventor at Unknown. The first was granted in 1999 and the most recent in November 2008. Norbert Topf ranks #1,709,992 of 4,157,543 US inventors in our database (top 41.1%). Patent records list Norbert Topf in Dresden, DE.

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
7456226 Method and installation for producing liquid energy carriers from a solid carbon carrier Guenter Liebisch 2008-11-25
5961673 Process and apparatus for producing fuel gas Guenter Reichert, Dieter Hahn, Guenter Liebisch 1999-10-05