Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
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Norbert Dunker — 1 Patent

NSNippon Steel: 1 patents #2,111 of 4,423Top 50%
RARuhrkohle Ag: 1 patents #23 of 88Top 30%
Recklinghausen, DE: #190 of 345 inventorsTop 60%
Overall (All Time): #2,406,284 of 4,157,543Top 60%
1 Patents All Time
Norbert Dunker has been granted 1 US patent while listed as an inventor at Nippon Steel. All of these patents were granted in 1995. Norbert Dunker ranks #2,406,284 of 4,157,543 US inventors in our database (top 57.9%). Patent records list Norbert Dunker in Recklinghausen, DE.

Issued Patents All Time

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
5421963 Coke-feeding device with housing for a dry cooling installation for coke Wilhelm Stewen, Heinz Opdenwinkel, Naoto Yasukouchi, Kazushi Kishigami 1995-06-06