Patent Leaderboard
USPTO Patent Rankings Data through Sept 30, 2025
TC

Thomas Young Chang

STSeagate Technology: 42 patents #82 of 4,626Top 2%
IBM: 24 patents #4,429 of 70,183Top 7%
USUmax Data Systems: 19 patents #3 of 119Top 3%
P2Paragon 28: 14 patents #13 of 52Top 25%
HGHGST: 3 patents #567 of 1,677Top 35%
W(Western Digital (Fremont): 1 patents #299 of 473Top 65%
California: #2,061 of 386,348 inventorsTop 1%
Overall (All Time): #13,369 of 4,157,543Top 1%
104 Patents All Time

Issued Patents All Time

Showing 76–100 of 104 patents

Patent #TitleCo-InventorsDate
6201670 Merged magnetic head that includes a write head with single-sided notched first pole piece Edward Hinpong Lee, Jyh-Shuey Lo 2001-03-13
6158107 Inverted merged MR head with plated notched first pole tip and self-aligned second pole tip Jyh-Shuey Lo 2000-12-12
6122144 Contoured pole tip structures for minimizing side track erasure David Heim, Edward Hinpong Lee 2000-09-19
6119331 Notching the first pole piece of a write head with a notching layer in a combined magnetic head Edward Hinpong Lee, Jhy-Shuey Jerry Lo 2000-09-19
6069775 Inverted merged MR head with precise track width Jyh-Shuey Lo 2000-05-30
6054023 Method of making inverted merged MR head with track width defining first pole tip component constructed on a side wall Jyh-Shuey Lo 2000-04-25
6043960 Inverted merged MR head with track width defining first pole tip component constructed on a side wall Jyh-Shuey Lo 2000-03-28
6029339 Method of making write head with recessed stitched yoke on a planar portion of an insulation layer defining zero throat height Mohamad Towfik Krounbi, Edward Hinpong Lee, Douglas Johnson Werner 2000-02-29
D413584 Scanner Jesse Wu, Chia-Lien Hung 1999-09-07
D405067 Scanner Tony Chen 1999-02-02
D405069 Scanner Jesse Wu, Tony Chen 1999-02-02
D405068 Scanner Tony Chen 1999-02-02
5805391 Write head with recessed stitched yoke on a planar portion of an insulation layer defining zero throat height Mohamad Towfik Krounbi, Edward Hinpong Lee, Douglas Johnson Werner 1998-09-08
5798897 Inductive write head with insulation stack configured for eliminating reflective notching Edward Hinpong Lee 1998-08-25
D397096 Paper delivering scanner Tony Chen 1998-08-18
D397106 Slide scanner cover Tony Chen 1998-08-18
D396704 Visual image scanner Tony Chen 1998-08-04
D394429 Paper delivering scanner Tony Chen, Jesse Wu 1998-05-19
D389468 Wave shaped scanner Tony Chen 1998-01-20
D388773 Scanner Tony Chen 1998-01-06
D388067 Video frame grabber Tony Chen, Jesse Wu 1997-12-23
D382857 Mini computer video information converter Tony Chen 1997-08-26
D377168 Visual image scanner Tony Chen 1997-01-07
D370893 Image scanner Tony Chen 1996-06-18
D370667 Computer image converter Tony Chen 1996-06-11