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

David Yu Chang — 9 Patents in 2021

IBM: 6 patents #871 of 11,638Top 8%
Caterpillar: 3 patents #49 of 826Top 6%
Edwards, IL: #1 of 6 inventorsTop 20%
Illinois: #143 of 8,822 inventorsTop 2%
Overall (2021): #10,735 of 548,734Top 2%
9 Patents 2021

Issued Patents 2021

Showing 1–9 of 9 patents

Patent #TitleCo-InventorsDate
11196774 Network application security question detection and modification Yi-Hsiu Wei, Ching-Yun Chao 2021-12-07
11176274 Protecting user data Adam Yoho, Wilalberto Rodriguez, Paul W. Bennett, Zechariah Hein 2021-11-16
11138188 Performance optimization Ching-Yun Chao, Yi-Hsiu Wei 2021-10-05
11078826 Gaseous fuel engine and sparkless operating strategy therefor 2021-08-03
11078827 Pre-chamber ignition system having igniter with gas orifice structured for pre-expanding outgoing combustion gases 2021-08-03
11066977 Ignitor for natural gas engine 2021-07-20
11032083 Atomic transactional processing Ching-Yun Chao, Yi-Hsiu Wei 2021-06-08
10929616 Topic based conversation retrieval Messaoud Benantar, Vishwanath Venkataramappa, Liam Harpur 2021-02-23
10897463 Managing and securing manageable resources in stateless web server architecture using servlet filters John Y. Chang, Vishwanath Venkataramappa 2021-01-19