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USPTO Patent Rankings Data through Dec 31, 2025
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Katsumi Eikyu — 21 Patents

RERenesas Electronics: 13 patents #207 of 4,529Top 5%
Mitsubishi Electric: 6 patents #4,940 of 25,717Top 20%
RTRenesas Technology: 2 patents #1,374 of 3,337Top 45%
Sumitomo Electric Industries: 2 patents #9,741 of 21,551Top 50%
Tokyo, JP: #7,076 of 90,295 inventorsTop 8%
Overall (All Time): #201,324 of 4,157,543Top 5%
21 Patents All Time
Katsumi Eikyu has been granted 21 US patents while listed as an inventor at Renesas Electronics. The first was granted in 1998 and the most recent in August 2025. Katsumi Eikyu ranks #201,324 of 4,157,543 US inventors in our database (top 4.8%). Patent records list Katsumi Eikyu in Tokyo, JP.

Patents per Year

Patents granted per year, 1998 to 2025Bar chart with a peak of 3 patents in 2005.peak 31998: 1 patents19982002: 1 patents2003: 2 patents20032004: 1 patents2005: 3 patents20052016: 1 patents2017: 1 patents20172018: 1 patents2020: 1 patents20202021: 1 patents2022: 2 patents20222023: 2 patents2024: 3 patents20242025: 1 patents2025

Issued Patents All Time

Showing 1–21 of 21 patents

Patent #TitleCo-InventorsDateApprox Value ⓘ
12402368 Semiconductor device and method of manufacturing the same Yuta NABUCHI, Atsushi Sakai, Akihiro Shimomura, Satoru TOKUDA 2025-08-26
12159934 Semiconductor device Atsushi Sakai, Yotaro GOTO 2024-12-03
12125905 Semiconductor device Yoshinori Kaya, Akihiro Shimomura, Hiroshi Yanagigawa, Kazuhisa Mori 2024-10-22
11876127 Semiconductor device and method of manufacturing the same Tomohiro Imai, Yoshito Nakazawa 2024-01-16
11646376 Semiconductor device and method of manufacturing the same Eiji Tsukuda 2023-05-09
11557648 Semiconductor device and method of manufacturing the same Hiroshi Yanagigawa, Masami Sawada, Akihiro Shimomura, Kazuhisa Mori 2023-01-17
11527632 Semiconductor device and method of manufacturing the same Yotaro GOTO, Yoshihiro Nomura 2022-12-13
11362207 Semiconductor device Atsushi Sakai, Satoru TOKUDA, Ryuuji Umemoto, Hiroshi Yanagigawa 2022-06-14
10923422 Semiconductor device Fumihito Ota, Takashi Ipposhi 2021-02-16
10861786 Semiconductor device having a multilayer structure Yoshikazu Nagamura, Takashi Ipposhi 2020-12-08
10121894 Semiconductor device and method of manufacturing the same Atsushi Sakai 2018-11-06
9755094 Imaging device Atsushi Sakai 2017-09-05
9437644 Semiconductor device and method of manufacturing same Atsushi Sakai, Hiroyuki ARIE 2016-09-06
6950369 Magnetic memory device capable of passing bidirectional currents through the bit lines Tatsuya Kunikiyo 2005-09-27
6894520 Semiconductor device and capacitance measurement method Kyoji Yamashita, Hiroyuki Umimoto, Mutsumi Kobayashi, Katsuhiro Ohtani, Tatsuya Kunikiyo 2005-05-17 $184,000
6876208 Semiconductor device and method of checking semiconductor storage device Tatsuya Kunikiyo, Kyoji Yamashita, Katsuhiro Ohtani, Hiroyuki Umimoto, Mutsumi Kobayashi 2005-04-05 $190,000
6741495 Magnetic memory device and magnetic substrate Tatsuya Kunikiyo, Shigenobu Maeda 2004-05-25
6576965 Semiconductor device with lightly doped drain layer Yukio Nishida 2003-06-10
6567299 Magnetic memory device and magnetic substrate Tatsuya Kunikiyo, Shigenobu Maeda 2003-05-20
6461946 Method of manufacturing semiconductor device Takeshi Kitani, Masao Sugiyama 2002-10-08
5845105 Method of simulating semiconductor manufacture with process functions according to user application Tatsuya Kunikiyo, Kenichiro Sonoda, Masato Fujinaga, Kiyoshi Ishikawa, Norihiko Kotani 1998-12-01

Frequent Collaborators

Atsushi Sakai6 shared
Tatsuya Kunikiyo6 shared
Hiroshi Yanagigawa3 shared
Akihiro Shimomura3 shared
Hiroyuki Umimoto2 shared
Satoru TOKUDA2 shared

Nearby-Ranked Inventors

Subhash Sankuratripati21
Brian Riordan21
Woongki Min21
Jeremy Cailleteau21
Shigeru Chiba21
Cecilia Carbonelli21
Pin-Wen Chen21
Michael Danz21
Paul Kolen21