Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
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Kenji Kato — 272 Patents

SISeiko Instruments: 50 patents #14 of 1,437Top 1%
Ngk Spark Plug Co.: 21 patents #55 of 1,594Top 4%
JCJanome Sewing Machine Co.: 20 patents #14 of 229Top 7%
Denso: 19 patents #459 of 11,792Top 4%
SCSumitomo Metal Mining Co.: 15 patents #30 of 736Top 5%
Toyota: 14 patents #1,982 of 26,838Top 8%
KRKabushikikaisha Equos Research: 8 patents #8 of 103Top 8%
NCNippon Oil & Fats Co.: 8 patents #21 of 409Top 6%
NINgk Insulators: 8 patents #403 of 2,083Top 20%
MCMitsubishi Gas Chemical Company: 7 patents #273 of 1,727Top 20%
Mitsubishi Electric: 7 patents #4,301 of 25,717Top 20%
SCSeiko Instruments R & D Center: 6 patents #2 of 38Top 6%
TCTaiyo Ink Mfg. Co.: 6 patents #10 of 95Top 15%
NSNippon Steel: 6 patents #412 of 4,423Top 10%
HDHitachi Displays: 5 patents #194 of 752Top 30%
CCClarion Co.: 4 patents #133 of 721Top 20%
UNUnknown: 4 patents #4,220 of 83,584Top 6%
Kubota: 4 patents #505 of 2,059Top 25%
KOKonica: 4 patents #638 of 1,958Top 35%
NONof: 3 patents #95 of 561Top 20%
Sumitomo Electric Industries: 3 patents #7,735 of 21,551Top 40%
ABAsahi Breweries: 3 patents #9 of 116Top 8%
FCFuji Capsule Co.: 3 patents #1 of 16Top 7%
SISumitomo Light Metal Industries: 3 patents #39 of 254Top 20%
NCNissin Electric Co.: 3 patents #42 of 208Top 25%
TFThe Japan Iron And Steel Federation: 2 patents #1 of 27Top 4%
ACAsmo Co.: 2 patents #218 of 745Top 30%
DCDiafoil Hoechst Company: 2 patents #14 of 41Top 35%
EMEmd: 2 patents #3 of 25Top 15%
ECEquos Research Co.: 2 patents #16 of 97Top 20%
KUKyushu University, National University: 2 patents #118 of 767Top 20%
Mazda Motor: 2 patents #1,722 of 4,755Top 40%
MCMgc Filsheet Co.: 2 patents #26 of 79Top 35%
NCNippon Oils & Fats Company: 2 patents #1 of 10Top 10%
NCNippondenso Co.: 2 patents #1,150 of 3,479Top 35%
ACAisin Aw Co.: 2 patents #784 of 2,011Top 40%
TKToshiba Kikai: 2 patents #223 of 713Top 35%
NASA: 2 patents #964 of 3,881Top 25%
NCNihon Micro Coating Co.: 1 patents #29 of 68Top 45%
NKNippon Gohsei Kagaku Kogyo: 1 patents #62 of 142Top 45%
Honda Motor Co.: 1 patents #12,035 of 21,052Top 60%
ACAsahi Glass Co.: 1 patents #1,233 of 2,251Top 55%
HAHitachi Astemo: 1 patents #649 of 1,276Top 55%
Nec: 1 patents #7,928 of 14,502Top 55%
Nissan Motor Co.: 1 patents #4,519 of 8,689Top 55%
GLGloberide: 1 patents #84 of 116Top 75%
FLFujitsu Microelectronics Limited: 1 patents #212 of 624Top 35%
OCOki Semiconductor Co.: 1 patents #202 of 526Top 40%
OCOrgan Needle Co.: 1 patents #3 of 16Top 20%
PCPurpose Co.: 1 patents #21 of 34Top 65%
SCSanyo Electric Co.: 1 patents #3,644 of 6,347Top 60%
SESeiko Epson: 1 patents #5,551 of 7,774Top 75%
Fujitsu Limited: 1 patents #14,843 of 24,456Top 65%
F-F-Tech: 1 patents #28 of 100Top 30%
SCShiroki Kogyo Co.: 1 patents #14 of 31Top 50%
SHShowa: 1 patents #167 of 337Top 50%
EBEbara: 1 patents #1,014 of 1,611Top 65%
DLDiafoil Company, Limited: 1 patents #30 of 52Top 60%
DCDaifuku Co.: 1 patents #230 of 509Top 50%
TCTachibana Eletech Co.: 1 patents #9 of 14Top 65%
BUBuffalo: 1 patents #42 of 80Top 55%
Kabushiki Kaisha Toshiba: 1 patents #13,641 of 21,451Top 65%
MCMitsubishi Chemical: 1 patents #1,786 of 3,022Top 60%
TCTottori Sanyo Electric Co.: 1 patents #85 of 224Top 40%
MMMitsubishi Motors: 1 patents #856 of 1,823Top 50%
MCMitsumi Electric Co.: 1 patents #527 of 935Top 60%
ACAtsumitec Co.: 1 patents #14 of 44Top 35%
JTJtekt: 1 patents #1,102 of 1,969Top 60%
JCJanome Sewing Machine Industry Co.: 1 patents #20 of 34Top 60%
NLNicoventures Trading Limited: 1 patents #213 of 303Top 75%
Overall (All Time): #1,647 of 4,157,543Top 1%
272 Patents All Time
Kenji Kato has been granted 272 US patents while listed as an inventor at Seiko Instruments. The first was granted in 1980 and the most recent in November 2025. Kenji Kato ranks #1,647 of 4,157,543 US inventors in our database (top 0.04%). Patent records list Kenji Kato in Tokyo, CA, JP.

Patents per Year

Patents granted per year, 1996 to 2025Bar chart with a peak of 22 patents in 2004.peak 221996: 2 patents19961997: 3 patents1998: 4 patents1999: 8 patents19992000: 7 patents2001: 11 patents2002: 13 patents20022003: 14 patents2004: 22 patents2005: 11 patents20052006: 10 patents2007: 11 patents2008: 6 patents20082009: 11 patents2010: 10 patents2011: 10 patents20112012: 6 patents2013: 8 patents2014: 5 patents20142015: 6 patents2016: 7 patents2017: 8 patents20172018: 5 patents2019: 3 patents2020: 1 patents20202021: 5 patents2022: 5 patents2023: 2 patents20232024: 7 patents2025: 4 patents2025

Issued Patents All Time

Showing 1–25 of 272 patents

Patent #TitleCo-InventorsDateApprox Value ⓘ
12466441 Vehicle control apparatus for negotiating grade crossings Ryoko Araki, Yohei MASUI, Yuta KOMOGUCHI 2025-11-11
12424905 Stator and dynamo-electric machine Hideaki Arita, Yuki Hidaka 2025-09-23
12214784 Driving assistance control apparatus, driving assistance system, and driving assistance control method for vehicle Yuta KOMOGUCHI, Yohei MASUI 2025-02-04
12206295 Rotating electric machine system having a control circuit that estimates an internal state Taiga Komatsu, Yuki Hidaka, Hideaki Arita 2025-01-21
12075822 Capsule for tobacco industry product Peter Wan, Frank Merzbach, Kazuhiko Watanabe, Yosuke Kondo 2024-09-03
12043739 Curable water-swelling waterstop material, waterstop steel sheet pile, waterstop steel sheet pile production method, and water-stopping method Takaaki Higashino 2024-07-23
12030239 Molding material, molded product, and method for producing molded product Norihito SAKAI 2024-07-09 $205,000
11990954 Wearable key device and electronic key system Yoichi Kato, Takeshi Kumazaki 2024-05-21
11930798 Fishing rod comprising multiple jointed rod bodies Yasuhiro Tsukamoto, Atsushi Saito, Masayoshi Nakao, Isao Oota 2024-03-19
11899096 Transmission control device, vehicle system, transmission control method, and control program product 2024-02-13
11886566 Vehicle authentication system and in-vehicle device Toru Yamaguchi, Takeshi Kumazaki 2024-01-30
11855570 Motor device Hideaki Arita, Taiga Komatsu, Yuki Hidaka, Shohei FUJIKURA, Hiroyuki Higashino 2023-12-26
11840232 Driving assistance device Satoru Noro 2023-12-12
11524688 Apparatus and method for assisting turn of vehicle at intersection Yohei MASUI, Mitsuhiro Tokimasa, Yuta KOMOGUCHI 2022-12-13
11419494 Field-deployable neurological assessment tool for performance readiness and telemedicine Leland S. Stone, Dorion Bryce Liston, Bernard D. Adelstein, Mark Richard Anderson 2022-08-23
11391354 Gear for differential and differential Kenji Fukasawa 2022-07-19
11386727 Transmission control device 2022-07-12
11338773 Transmission control device, portable device, vehicle system, transmission control method, control method, and control program product 2022-05-24
11140005 In-vehicle communication system between master node and slave node 2021-10-05
11108233 Manufacturing method of solar house 2021-08-31
11084371 Motor drive device Kenji Fukasawa, Hiroyuki Takahashi, Yutaka Hozumi, Sumitaka Ito, Junichi Midorikawa +1 more 2021-08-10
10961888 NOx sensor control device and NOx sensor control method Yuuya Nakayama, Hirotaka Onogi, Masao Tsuzuki, Takumi NISHIYAMA 2021-03-30
10921783 Numerical control device Masakazu Sagasaki 2021-02-16
10870939 Sewing machine needle Chie Hasegawa, Yuji Ichikawa, Mai Mitsuya, Kazutaka Hakoyama, Yoshikazu Kohara 2020-12-22
10346694 Vehicle start support device Kota Irie, Daisuke Fukuda, Shinya Tagawa 2019-07-09