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USPTO Patent Rankings Data through Dec 31, 2025
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Duc Doan — 20 Patents

DSDialog Semiconductor: 7 patents #41 of 293Top 15%
SLSub-One Technology, Llc.: 2 patents #8 of 13Top 65%
IBM: 2 patents #32,909 of 70,183Top 50%
Campbell, CA: #251 of 2,187 inventorsTop 15%
California: #29,208 of 386,348 inventorsTop 8%
Overall (All Time): #214,803 of 4,157,543Top 6%
20 Patents All Time
Duc Doan has been granted 20 US patents while listed as an inventor at Dialog Semiconductor. The first was granted in 1980 and the most recent in February 2021. Duc Doan ranks #214,803 of 4,157,543 US inventors in our database (top 5.2%). Patent records list Duc Doan in Campbell, CA, US.

Patents per Year

Patents granted per year, 1980 to 2021Bar chart with a peak of 5 patents in 2018.peak 51980: 2 patents19801982: 1 patents1994: 1 patents19941996: 2 patents1997: 1 patents19971999: 1 patents2005: 1 patents20052006: 1 patents2014: 1 patents20142016: 1 patents2017: 1 patents20172018: 5 patents2019: 1 patents20192021: 1 patents2021

Issued Patents All Time

Showing 1–20 of 20 patents

Patent #TitleCo-InventorsDateApprox Value ⓘ
10917018 Auxiliary winding ground fault detection for isolated DC/DC converter Pengju Kong, Fuqiang Shi 2021-02-09
10297425 Multiple anode plasma for CVD in a hollow article Deepak Upadhyaya, Karthik Boinapally, William J. Boardman, Matthew MaMoody, Thomas B. Casserly +1 more 2019-05-21
10090671 Short circuit protection for data interface charging Yimin Chen, Mengfei Liu, Xiaoyong Zhang, Jianming Yao 2018-10-02
10084382 Adaptive valley mode switching Pengju Kong, Hien Huu Bui, Cong Zheng 2018-09-25
10044277 Regulation of the power supply voltage for a flyback converter controller Fuqiang Shi, Hien Huu Bui, Xiaye Wang 2018-08-07
9985537 Primary sensing of output voltage for an AC-DC power converter Fuqiang Shi, Pengju Kong, Hien Huu Bui, Judy Sha, David Nguyen 2018-05-29
9979305 Auxiliary winding ground fault detection for isolated DC/DC converter Pengju Kong, Fuqiang Shi 2018-05-22
9543819 Adaptive BJT driver for switching power converter Pengju Kong, Hien Huu Bui, John Shi, Judy Sha 2017-01-10
9520797 Adaptive reference voltage for switching power converters Pengju Kong, Hien Huu Bui, Fuqiang Shi, Judy Sha 2016-12-13
8715789 Chemical vapor deposition for an interior of a hollow article with high aspect ratio Deepak Upadhyaya, Karthik Boinapally, William J. Boardman, Matthew MaMoody, Thomas B. Casserly +1 more 2014-05-06
6985073 Apparatus for monitoring traffic signals and alerting drivers — 2006-01-10
6860286 Water supply system for multiple dwelling units — 2005-03-01
5878278 System for controlling connection requests by each IO controllers storing and managing a request queue wherein additional channel addresses can be added Paul P. Carreiro, Alena Chang, Robert R. Fish 1999-03-02 $11,544,000
D378066 Measurement, spacer and barricade warning tape — 1997-02-18
5561824 Storage management of data for ensuring communication of minimal length data Paul P. Carreiro, Robert R. Fish, David R. Nowlen, James T. Brady, Philip G. Bowser 1996-10-01 $9,792,000
D370450 Protective license plate cover design — 1996-06-04
5322033 Mechanism for indicating when to change engine oil — 1994-06-21
D263075 Combined ear wax remover and tooth pick — 1982-02-16
4233766 Telephone mounting stand — 1980-11-18
4200904 Solar powered street lighting system — 1980-04-29

Frequent Collaborators

Pengju Kong6 shared
Fuqiang Shi5 shared
Hien Huu Bui5 shared
Judy Sha3 shared
Paul P. Carreiro2 shared
Deepak Upadhyaya2 shared

Nearby-Ranked Inventors

Anthony Mertes20
Ed Merjanian20
Arthur J. Higby20
Daniel Rosenberg20
Anthony J. Kuschel20
Mark E. Fauver20
Markus Wintermantel20
Dominik Schnieders20
Christopher P. Roche20