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

William Chang — 8 Patents

RSRapiscan Systems: 2 patents #51 of 130Top 40%
Monterey Park, CA: #35 of 275 inventorsTop 15%
California: #74,834 of 386,348 inventorsTop 20%
Overall (All Time): #600,572 of 4,157,543Top 15%
8 Patents All Time
William Chang has been granted 8 US patents while listed as an inventor at Rapiscan Systems. The first was granted in 1990 and the most recent in September 2017. William Chang ranks #600,572 of 4,157,543 US inventors in our database (top 14.4%). Patent records list William Chang in Monterey Park, CA, US.

Issued Patents All Time

Showing 1–8 of 8 patents

Patent #TitleCo-InventorsDateApprox Value ⓘ
9772426 Systems and methods for automated, rapid detection of high-atomic-number materials Robert A. Armistead, Jr., Edward D. Franco, Joseph Bendahan, Jolyon Browne 2017-09-26 $10,105,000
8633823 Systems and methods for automated, rapid detection of high-atomic-number materials Robert A. Armistead, Jr., Edward D. Franco, Joseph Bendahan, Jolyon Browne 2014-01-21 $13,960,000
6577705 Combinatorial material analysis using X-ray capillary optics Xiao-Dong Xiang, Edward D. Franco 2003-06-10
6170226 Capsule filling apparatus 2001-01-09
5503810 System for producing herbal concentrate 1996-04-02
5466454 Method and apparatus for producing herbal concentrate 1995-11-14
D341593 Paging amplifier console 1993-11-23
4950279 Acupuncture delivery system 1990-08-21