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

Takeo Yamashita — 43 Patents

Hitachi: 23 patents #1,433 of 28,497Top 6%
HAHitachi Astemo: 10 patents #26 of 1,276Top 3%
UNUnknown: 7 patents #1,646 of 83,584Top 2%
TKTakasago Netsugaku Kogyo Kabushiki Kaisha: 1 patents #3 of 13Top 25%
Canon: 1 patents #14,969 of 19,416Top 80%
ARAsahi Rubber: 1 patents #20 of 63Top 35%
HGHGST: 1 patents #1,167 of 483Top 245%
HSHitachi Automotive Systems: 1 patents #965 of 1,636Top 60%
TOTadahiro Ohmi: 1 patents #22 of 65Top 35%
Hitachinaka, JP: #86 of 2,447 inventorsTop 4%
Overall (All Time): #69,380 of 4,157,543Top 2%
43 Patents All Time
Takeo Yamashita has been granted 43 US patents while listed as an inventor at Hitachi. The first was granted in 1984 and the most recent in September 2025. Takeo Yamashita ranks #69,380 of 4,157,543 US inventors in our database (top 1.7%). Patent records list Takeo Yamashita in Hitachinaka, JP.

Patents per Year

Patents granted per year, 1984 to 2025Bar chart with a peak of 6 patents in 1988.peak 61984: 1 patents19841985: 1 patents1986: 2 patents1987: 1 patents19871988: 6 patents1989: 3 patents1990: 2 patents19901992: 2 patents1993: 1 patents1995: 1 patents19951998: 3 patents1999: 1 patents2000: 2 patents20002005: 2 patents2006: 1 patents2007: 1 patents20072013: 2 patents2017: 1 patents2022: 1 patents20222023: 3 patents2024: 3 patents2025: 3 patents2025

Issued Patents All Time

Showing 1–25 of 43 patents

Patent #TitleCo-InventorsDateApprox Value ⓘ
12430284 Arithmetic operation device, testing method Yasuhiro Ikeda, Tadanobu Toba, Kenichi Shimbo, Atsushi ARATA, Atsushi Ichige +1 more 2025-09-30
12341420 Electronic control device for power conversion, and power supply IC Mitsuhiro IWASAKI, Masahiro Doi, Hitomi Aoyama, Shinichirou HIDA 2025-06-24
12316209 Method and system for diagnosing abnormality of power device drive in inverter device Masahiro Doi, Mitsuhiro IWASAKI 2025-05-27
12164352 Electronic control device and method for diagnosing electronic control device Mitsuhiro IWASAKI, Yuri Moizumi, Masahiro Doi 2024-12-10
12093066 Electronic control device Masahiro Doi, Yuri Ohara 2024-09-17
12080112 Electronic control device and diagnosis method of electronic control device Masahiro Doi, Yasushi Sugiyama, Yuri Ohara 2024-09-03
11726794 Preventing supply of power to a microcomputer of an electronic control device until capacitors are discharged Masahiro Doi, Yuri Moizumi 2023-08-15
11635472 Load driving device Yuri Ohara, Yasushi Sugiyama, Masahiro Doi 2023-04-25
11542885 Load drive circuit and load drive system Yasuo Shima, Yoshihisa Fujii 2023-01-03
11459996 Electronic control unit Yuri Ohara, Yasuo Shima, Masahiro Doi 2022-10-04
9780773 Load drive control device Takahiro Kawata, Ryoichi Oura, Masahito Sonehara, Yoshitaka Abe 2017-10-03
8443840 Excessive pressure release valve and release valve unit having the release valve Masashi Nemoto, Yukio Yaginuma 2013-05-21
8421512 Duty compensation circuit Tomoo Murata 2013-04-16
7245019 Semiconductor device with improved wiring arrangement utilizing a projecting portion and a method of manufacturing the same Tomoo Murata, Shinobu Yabuki 2007-07-17 $237,000
7154687 Overshoot current phase/amplitude control for hard disk drive write current Hiroshi Ikekame 2006-12-26 $98,000
6949478 Oxide film forming method Tadahiro Ohmi, Takashi Imaoka, Hisayuki Shimada, Nobuhiro Konishi, Mizuho Morita +5 more 2005-09-27
6870697 Overshoot current phase/amplitude control for hard disk drive write current Hiroshi Ikekame 2005-03-22 $137,000
6146135 Oxide film forming method Jinzo Watanabe, Masakazu Nakamura, Shintaro Aoyama, Hidetoshi Wakamatsu, Tadashi Shibata +5 more 2000-11-14
6051851 Semiconductor devices utilizing silicide reaction Tadahiro Ohmi, Mamoru Miyawaki, Yoshio Nakamura, Hiroshi Suzuki 2000-04-18 $284,000
5973535 Semiconductor circuit using feedback to latch multilevel data Tadashi Shibata, Tadahiro Ohmi 1999-10-26
5822497 Data sorting circuit Tadahiro Ohmi, Tadashi Shibata 1998-10-13
5818081 Semiconductor device Tadahiro Ohmi, Tadashi Shibata, Hideo Kosaka 1998-10-06
5784018 Semiconductor circuit Tadahiro Ohmi, Tadashi Shibata 1998-07-21
5463518 Magnetic head and magnetic recording and reproducing apparatus using a superconducting quantum interference device Shigekazu Otomo, Noriyuki Kumasaka, Kazuo Shiiki, Noritoshi Saito, Yoshinobu Tarutani 1995-10-31 $105,000
5247415 Magnetic head having main and auxiliary magnetic paths Noriyuki Kumasaka, Toshio Kobayashi, Ryoichi Nakatani, Shigekazu Otomo 1993-09-21 $56,000