Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
DC

Douglas Chang — 10 Patents

SYSynopsys: 8 patents #127 of 2,302Top 6%
BCBehavior Tech Computer: 1 patents #31 of 96Top 35%
KCKey Mouse Electronic Enterprise Co.: 1 patents #2 of 3Top 70%
San Jose, CA: #6,421 of 32,062 inventorsTop 25%
California: #61,378 of 386,348 inventorsTop 20%
Overall (All Time): #481,000 of 4,157,543Top 15%
10 Patents All Time
Douglas Chang has been granted 10 US patents while listed as an inventor at Synopsys. The first was granted in 1994 and the most recent in August 2024. Douglas Chang ranks #481,000 of 4,157,543 US inventors in our database (top 11.6%). Patent records list Douglas Chang in San Jose, CA, US.

Patents per Year

Patents granted per year, 1994 to 2024Bar chart with a peak of 2 patents in 2011.peak 21994: 1 patents19942001: 1 patents20012011: 2 patents20112014: 2 patents20142015: 1 patents20152019: 1 patents20192023: 1 patents20232024: 1 patents2024

Issued Patents All Time

Showing 1–10 of 10 patents

Patent #TitleCo-InventorsDateApprox Value ⓘ
12073156 Propagating physical design information through logical design hierarchy of an electronic circuit Amit Jalota, Andrew T. Saunders, Aruna Kanagaraj, Eshwari Rajendran, Prashant Gupta +4 more 2024-08-27 $119,064,000
11694016 Fast topology bus router for interconnect planning Zhengtao Yu, Balkrishna R. Rashingkar, David L. Peart, Yiding Han 2023-07-04
10318692 Scalable chip placement Balkrishna R. Rashingkar 2019-06-11 $10,916,000
9026974 Semiconductor integrated circuit partitioning and timing Russell B. Segal, Balkrishna R. Rashingkar, Mattias A. Hembruch 2015-05-05 $11,372,000
8910097 Netlist abstraction Balkrishna R. Rashingkar 2014-12-09 $11,113,000
8893073 Displaying a congestion indicator for a channel in a circuit design layout Balkrishna R. Rashingkar, David L. Peart, Russell B. Segal, Ksenia Roze 2014-11-18 $5,069,000
8037442 Method and apparatus for scaling I/O-cell placement during die-size optimization Peiqing Zou, Neeraj Kaul 2011-10-11 $2,777,000
8001514 Method and apparatus for computing a detailed routability estimation Neeraj Kaul, Balkrishna R. Rashingkar 2011-08-16 $2,617,000
6285355 Mouse-associated Z-axis encoder 2001-09-04
5345253 Track ball base structure 1994-09-06