Patent Leaderboard
USPTO Patent Rankings Data through Sept 30, 2025
Home › Inventors › Hann-Tzong Chern
HC

Hann-Tzong Chern

Overall (All Time): #2,323,111 of 4,157,543Top 60%
2 Patents All Time

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
4968168 Ballpoint pen with clicking — 1990-11-06
4917518 Automatic pencil — 1990-04-17

Nearby-Ranked Inventors

Howard L. Thom2
Milan Hadravsky2
Mojmir Petran2
Roger D. Bullard2
Shinji Katsube2
Harry E. Wilcox2
William A. Bollinger2
Karl Haberhauer2
Jean H. Lagneau2