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

Kei Hirata — 114 Patents

Tdk: 70 patents #23 of 3,796Top 1%
KCKuraray Co.: 16 patents #58 of 1,827Top 4%
FIFujifilm Business Innovation: 15 patents #697 of 5,238Top 15%
HTHeadway Technologies: 9 patents #89 of 309Top 30%
AMAmyris: 8 patents #6 of 97Top 7%
S(Sae Magnetics (H.K.): 4 patents #114 of 585Top 20%
ACAsmo Co.: 3 patents #159 of 745Top 25%
Toyota: 1 patents #15,486 of 26,838Top 60%
Micron: 1 patents #5,676 of 6,374Top 90%
Overall (All Time): #11,094 of 4,157,543Top 1%
114 Patents All Time
Kei Hirata has been granted 114 US patents while listed as an inventor at Tdk. The first was granted in 1996 and the most recent in August 2024. Kei Hirata ranks #11,094 of 4,157,543 US inventors in our database (top 0.27%). Patent records list Kei Hirata in Kosai, CA, JP.

Patents per Year

Patents granted per year, 1996 to 2024Bar chart with a peak of 18 patents in 2011.peak 181996: 1 patents19961998: 1 patents1999: 1 patents19992007: 1 patents2008: 3 patents20082009: 5 patents2010: 17 patents20102011: 18 patents2012: 13 patents20122013: 13 patents2014: 9 patents20142015: 4 patents2016: 4 patents20162017: 8 patents2019: 7 patents20192020: 5 patents2022: 1 patents20222023: 1 patents2024: 2 patents2024

Issued Patents All Time

Showing 1–25 of 114 patents

Patent #TitleCo-InventorsDateApprox Value ⓘ
12073857 Perpendicular magnetic recording head equipping a spin torque oscillator element with an electric current in side gaps Kowang Liu, Yue Liu, Jiun-Ting Lee, Weihao Xu 2024-08-27
12024619 Rubber compositions Yosuke UEHARA 2024-07-02
11699460 Perpendicular magnetic recording (PMR) writer with recessed leading shield Ying Liu, Yuhui Tang, Yue Liu 2023-07-11
11295767 Perpendicular magnetic recording (PMR) writer with recessed leading shield Ying Liu, Yuhui Tang, Yue Liu 2022-04-05
10839829 Magnetic head with a main pole including first and second layers and manufacturing method for the same Yoshitaka Sasaki, Hiroyuki Ito, Kazuki Sato, Shigeki Tanemura, Tetsuya Roppongi +2 more 2020-11-17
10781298 Copolymer, rubber composition using same, and tire Daisuke Koda 2020-09-22
10665391 Capacitor having bottom electrode comprising TiN 2020-05-26 $16,522,000
10586558 Magnetic head including a main pole and a write shield Yoshitaka Sasaki, Hiroyuki Ito, Kazuki Sato, Shigeki Tanemura, Hironori Araki +1 more 2020-03-10
10550248 Rubber composition and tire Daisuke Koda 2020-02-04
10522178 High damping shield with low magnetic moment in perpendicular magnetic recording (PMR) writer Ying Liu, Yue Liu, Yuhui Tang 2019-12-31
10490210 Optimization of high damping shield geometry in perpendicular magnetic recording (PMR) writer Ying Liu, Yue Liu, Yuhui Tang 2019-11-26
10414834 Modified liquid diene rubber and resin composition containing modified liquid diene rubber Satoshi Motoda 2019-09-17
10370525 Rubber compositions Daisuke Koda 2019-08-06
10339964 Perpendicular magnetic recording (PMR) write head with patterned high moment trailing shield Ying Liu, Yue Liu, Yuhui Tang 2019-07-02
10297277 Magnetic head including a coil and a magnetic path forming section Yoshitaka Sasaki, Hiroyuki Ito, Kazuki Sato, Shigeki Tanemura, Atsushi Yamaguchi 2019-05-21
10227481 Rubber composition, vulcanized rubber, and tire Daisuke Koda, Hiroshi Kanbara 2019-03-12
9850336 Copolymer, rubber composition using same, and tire Daisuke Koda 2017-12-26
9741371 Magnetic head for perpendicular magnetic recording including a write shield Atsushi Yamaguchi, Michitaka Nishiyama, Kenkichi Anagawa 2017-08-22
9732206 Copolymer, rubber composition using same, and tire Daisuke Koda 2017-08-15
9721592 Perpendicular magnetic recording head with trailing gap covering magnetic pole and side gaps and method of manufacturing same Shingo Miyata 2017-08-01
9704511 Perpendicular magnetic recording head with improved density recording Hideyuki Ukita, Kenkichi Anagawa, Atsushi Yamaguchi, Ittetsu Kitajima 2017-07-11
9640205 Magnetic recording-reproducing head having different sections with different functions including an erase function Akimasa Kaizu, Yosuke Antoku 2017-05-02
9598507 Modified liquid diene-based rubber and production process for the same Satoshi Motoda 2017-03-21
9534111 Rubber composition and tire Shigenao Kuwahara, Daisuke Koda 2017-01-03
9421949 Wiper for vehicle Keita Uchiyama 2016-08-23