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Seiichi Hayashi — 38 Patents

Hitachi: 12 patents #3,473 of 28,497Top 15%

Nichia: 7 patents #276 of 1,531Top 20%

KOKomatsu: 6 patents #303 of 2,087Top 15%

RIRigaku: 4 patents #52 of 239Top 25%

SESeiko Epson: 4 patents #3,385 of 7,774Top 45%

Kawasaki: 3 patents #725 of 2,943Top 25%

HDHitachi Denshi: 1 patents #119 of 275Top 45%

ICIwatsu Electric Co.: 1 patents #87 of 212Top 45%

NKNippon Kayaku: 1 patents #556 of 1,103Top 55%

FCFurukawa Electric Co.: 1 patents #1,270 of 2,370Top 55%

KSKomatsu Shisakusho: 1 patents #409 of 885Top 50%

UNUnitika: 1 patents #257 of 620Top 45%

Anan, JP: #12 of 306 inventorsTop 4%

Overall (All Time): #84,675 of 4,157,543Top 3%

38 Patents All Time

Seiichi Hayashi has been granted 38 US patents while listed as an inventor at Hitachi. The first was granted in 1984 and the most recent in September 2025. Seiichi Hayashi ranks #84,675 of 4,157,543 US inventors in our database (top 2.0%). Patent records list Seiichi Hayashi in Anan, JP.

Patents per Year

Issued Patents All Time

Showing 1–25 of 38 patents

Patent #	Title	Co-Inventors	Date	Approx Value ⓘ
12408490	Light emitting element	—	2025-09-02
12068429	Method for manufacturing light-emitting element	—	2024-08-20
11611013	Method for manufacturing light-emitting element	—	2023-03-21
11569413	Method for manufacturing light-emitting element	—	2023-01-31
11538962	Light-emitting element and method for manufacturing light-emitting element	—	2022-12-27
11063084	Method for manufacturing light-emitting element	Hirofumi Nishiyama, Toshinori Wada	2021-07-13
9912123	Semiconductor light emitting device	—	2018-03-06
9815140	Power control method for fiber laser processing machine, and fiber laser processing machine	—	2017-11-14
9499179	Railroad vehicle provided with low roof structure	Toshiyuki Hirashima, Hitoshi Nagahara, Yousuke Tsumura, Osamu Muragishi	2016-11-22
9434392	Collision energy absorption column and railroad vehicle provided with the collision energy absorption column	Toshiyuki Hirashima, Hitoshi Nagahara	2016-09-06
9343865	Laser device	Taizo Miyato, Kanji Tanaka, Koji Kajiwara, Akira Fujisaki	2016-05-17
9233694	Railcar including heat-resistant floor	Eiichi Kato, Chihiro Okayama, Osamu Muragishi, Yuji Kamei, Shuichi Mizuma	2016-01-12
D690744	Laser processing machine	Toshihiro Koide, Masahiko Okubo	2013-10-01
D690745	Laser processing machine	Toshihiro Koide, Koji Masauji	2013-10-01
6970532	Method and apparatus for measuring thin film, and thin film deposition system	Jimpei Harada, Tetsuo Kikuchi, Kazuhiko Omote, Katsuhiko Inaba	2005-11-29
6962726	Method for preparing substrate for flexible print wiring board, and substrate for flexible print wiring board	Akira Shigeta, Takeshi Yoshida, Jun Mori, Yoshiaki Echigo, Ryoichi Hasegawa +2 more	2005-11-08
6823042	Apparatus for X-ray analysis and apparatus for supplying X-rays	Jimpei Harada, Sadayuki Takahashi, Masaru Kuribayashi	2004-11-23
6333967	X-ray generator	Naohisa Osaka	2001-12-25
6249566	Apparatus for x-ray analysis	Jimpei Harada, Kazuhiko Omote	2001-06-19
5878327	Antenna apparatus and information transmitting system	Susumu Kasai, Masato Ishikawa	1999-03-02	$267,000
5448339	Control system for heat fixing apparatus	Norio Kokaji, Michiaki Yokozawa, Yuuichi Nakagawa, Mamoru Nishiguchi	1995-09-05
5127050	Information processing apparatus separably combined with telephone unit	Hidenobu Takahashi, Kengo Ando	1992-06-30	$38,000
5090220	Automatic washing machine having tub posture tilting mechanism	Sooichi Fukuzawa, Etsurou Hirose, Kazue Miyashita	1992-02-25	$26,000
4992893	Alignment disk for magnetic disk driving apparatus and method and apparatus for verifying tracking error of the magnetic disk driving apparatus	Hiroshi Kanai, Takeo Sonobe, Masayoshi Sunada, Kazuo Kikuchi, Yasumasa Saito +7 more	1991-02-12	$39,000
4952770	Laser-beam processing method and system	—	1990-08-28