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

Ruhang Ding — 9 Patents

HTHeadway Technologies: 8 patents #95 of 309Top 35%
Tdk: 1 patents #2,493 of 3,796Top 70%
Kabushiki Kaisha Toshiba: 1 patents #13,641 of 21,451Top 65%
Pleasanton, CA: #704 of 3,062 inventorsTop 25%
California: #67,547 of 386,348 inventorsTop 20%
Overall (All Time): #535,341 of 4,157,543Top 15%
9 Patents All Time
Ruhang Ding has been granted 9 US patents while listed as an inventor at Headway Technologies. The first was granted in 2014 and the most recent in March 2025. Ruhang Ding ranks #535,341 of 4,157,543 US inventors in our database (top 12.9%). Patent records list Ruhang Ding in Pleasanton, CA, US.

Patents per Year

Patents granted per year, 2014 to 2025Bar chart with a peak of 2 patents in 2014.peak 22014: 2 patents20142016: 2 patents20162017: 1 patents20172018: 1 patents20182019: 1 patents20192023: 1 patents20232025: 1 patents2025

Issued Patents All Time

Showing 1–9 of 9 patents

Patent #TitleCo-InventorsDate
12254908 System for controlling a critical dimension (CD) uniformity of a magnetic head device Tom Zhong, Hiroshi Omine, Jianing Zhou, Kunliang Zhang, Min Li 2025-03-18
11715491 Method of ultra-fine critical dimension patterning for magnetic head devices Tom Zhong, Hiroshi Omine, Jianing Zhou, Kunliang Zhang, Min Li 2023-08-01
10354707 Composite seed layer Kunliang Zhang, Min Li, Wenyu Chen 2019-07-16
10157634 Magnetic reader sensor with shield spacing improvement and better pin flip robustness Yewhee Chye, Wenyu Chen, Kunliang Zhang, Yan Wu, Min Li 2018-12-18
9799357 Magnetic reader sensor with shield spacing improvement and better pin flop robustness Yewhee Chye, Wenyu Chen, Kunliang Zhang, Min Li 2017-10-24
9437225 Reader designs of shield to shield spacing improvement Junjie Quan, Kunliang Zhang, Min Li, Yewhee Chye, Glen Garfunkel +1 more 2016-09-06
9337414 Reader sensor structure and its method of construction Min Li, Cherng-Chyi Han, Jianing Zhou, Minghui Yu 2016-05-10
8865008 Two step method to fabricate small dimension devices for magnetic recording applications Hui-Chuan Wang, Minghui Yu, Jianing Zhou, Min Li, Cherng-Chyi Han 2014-10-21
8780500 Microwave-assisted magnetic recording head, method of manufacturing the same, magnetic head assembly using the same, and magnetic recording/reproduction apparatus Satoshi Shirotori, Katsuhiko Koui, Shinobou Sugimura, Norihito Fujita, Akihiki Takeo +1 more 2014-07-15