Growing community of inventors

Kawasaki, Japan

Keiji Hayashi

Average Co-Inventor Count = 3.03

ph-index = 12

The patent ph-index is calculated by counting the number of publications for which an author has been cited by other authors at least that same number of times.

Forward Citations = 671

Keiji HayashiTetsuya Hamada (26 patents)Keiji HayashiToshihiro Suzuki (25 patents)Keiji HayashiTetsuya Kobayashi (24 patents)Keiji HayashiMari Sugawara (22 patents)Keiji HayashiTakeshi Gotoh (20 patents)Keiji HayashiHisashi Yamaguchi (10 patents)Keiji HayashiKomaharu Matsui (7 patents)Keiji HayashiTakeshi Eda (7 patents)Keiji HayashiKenji Sano (7 patents)Keiji HayashiHiroshi Ueda (7 patents)Keiji HayashiTsuyoshi Inoue (6 patents)Keiji HayashiKenichi Shibata (6 patents)Keiji HayashiHirokazu Aritake (4 patents)Keiji HayashiJunji Tomita (4 patents)Keiji HayashiMitsuyoshi Shirai (4 patents)Keiji HayashiMitsuru Horada (4 patents)Keiji HayashiKentaro Kamada (3 patents)Keiji HayashiSeiji Hachisuka (3 patents)Keiji HayashiAkio Sotokawa (3 patents)Keiji HayashiFumiaki Yamada (3 patents)Keiji HayashiKazuhiro Takahara (2 patents)Keiji HayashiNoriyuki Ohashi (2 patents)Keiji HayashiTakeshi Nakano (2 patents)Keiji HayashiYasutake Furukoshi (2 patents)Keiji HayashiKazuhito Okumura (2 patents)Keiji HayashiMotohiko Fukuhara (2 patents)Keiji HayashiMitsuhiro Moriyasu (2 patents)Keiji HayashiYukio Iigahama (2 patents)Keiji HayashiKoji Yoshioka (2 patents)Keiji HayashiShogo Sasaki (2 patents)Keiji HayashiMasanori Nishido (2 patents)Keiji HayashiShuuji Sugimoto (2 patents)Keiji HayashiRyoh Hatakeyama (2 patents)Keiji HayashiAkira Wakabayashi (2 patents)Keiji HayashiSouya Jo (2 patents)Keiji HayashiKenichi Kataoka (2 patents)Keiji HayashiTsuyoshi Kamada (1 patent)Keiji HayashiKatsufumi Ohmuro (1 patent)Keiji HayashiYoshio Koike (1 patent)Keiji HayashiKunihiro Tashiro (1 patent)Keiji HayashiYuichi Inoue (1 patent)Keiji HayashiYohei Nakanishi (1 patent)Keiji HayashiKazutaka Hanaoka (1 patent)Keiji HayashiYoshikazu Tanaka (1 patent)Keiji HayashiKazuya Ueda (1 patent)Keiji HayashiNorio Sugiura (1 patent)Keiji HayashiKimiaki Nakamura (1 patent)Keiji HayashiKenichi Okada (1 patent)Keiji HayashiShinpei Nagatani (1 patent)Keiji HayashiIsao Hirose (1 patent)Keiji HayashiSeiji Hayashimoto (1 patent)Keiji HayashiToshiyuki Umehara (1 patent)Keiji HayashiToshitaka Suzuki (1 patent)Keiji HayashiMasaru Ishiwa (1 patent)Keiji HayashiKoshu Yonemura (1 patent)Keiji HayashiHiroshi Sugawa (1 patent)Keiji HayashiHideo Hara (1 patent)Keiji HayashiKooki Ooyama (1 patent)Keiji HayashiMasayoshi Natsume (1 patent)Keiji HayashiShou Uchida (5 patents)Keiji HayashiMasakazu Morimoto (5 patents)Keiji HayashiTomohide Bamba (1 patent)Keiji HayashiToru Inamasu (1 patent)Keiji HayashiRyo Tanaka (1 patent)Keiji HayashiHiroyoshi Takahashi (1 patent)Keiji HayashiTadao Torii (1 patent)Keiji HayashiKazumasa Kaiwa (1 patent)Keiji HayashiIkkou Hanaki (1 patent)Keiji HayashiHiroyoshi Onishi (1 patent)Keiji HayashiMasayuki Nagata (1 patent)Keiji HayashiRyohei Sawazaki (2 patents)Keiji HayashiKouichi Katagawa (1 patent)Keiji HayashiAkifumi Kido (0 patent)Keiji HayashiJiro Yamato (0 patent)Keiji HayashiKouhei Takeda (0 patent)Keiji HayashiKeiji Hayashi (54 patents)Tetsuya HamadaTetsuya Hamada (75 patents)Toshihiro SuzukiToshihiro Suzuki (141 patents)Tetsuya KobayashiTetsuya Kobayashi (116 patents)Mari SugawaraMari Sugawara (28 patents)Takeshi GotohTakeshi Gotoh (28 patents)Hisashi YamaguchiHisashi Yamaguchi (68 patents)Komaharu MatsuiKomaharu Matsui (24 patents)Takeshi EdaTakeshi Eda (16 patents)Kenji SanoKenji Sano (13 patents)Hiroshi UedaHiroshi Ueda (12 patents)Tsuyoshi InoueTsuyoshi Inoue (94 patents)Kenichi ShibataKenichi Shibata (62 patents)Hirokazu AritakeHirokazu Aritake (64 patents)Junji TomitaJunji Tomita (35 patents)Mitsuyoshi ShiraiMitsuyoshi Shirai (16 patents)Mitsuru HoradaMitsuru Horada (5 patents)Kentaro KamadaKentaro Kamada (20 patents)Seiji HachisukaSeiji Hachisuka (17 patents)Akio SotokawaAkio Sotokawa (16 patents)Fumiaki YamadaFumiaki Yamada (14 patents)Kazuhiro TakaharaKazuhiro Takahara (20 patents)Noriyuki OhashiNoriyuki Ohashi (20 patents)Takeshi NakanoTakeshi Nakano (16 patents)Yasutake FurukoshiYasutake Furukoshi (15 patents)Kazuhito OkumuraKazuhito Okumura (12 patents)Motohiko FukuharaMotohiko Fukuhara (8 patents)Mitsuhiro MoriyasuMitsuhiro Moriyasu (7 patents)Yukio IigahamaYukio Iigahama (5 patents)Koji YoshiokaKoji Yoshioka (5 patents)Shogo SasakiShogo Sasaki (5 patents)Masanori NishidoMasanori Nishido (4 patents)Shuuji SugimotoShuuji Sugimoto (3 patents)Ryoh HatakeyamaRyoh Hatakeyama (3 patents)Akira WakabayashiAkira Wakabayashi (3 patents)Souya JoSouya Jo (2 patents)Kenichi KataokaKenichi Kataoka (2 patents)Tsuyoshi KamadaTsuyoshi Kamada (136 patents)Katsufumi OhmuroKatsufumi Ohmuro (119 patents)Yoshio KoikeYoshio Koike (110 patents)Kunihiro TashiroKunihiro Tashiro (103 patents)Yuichi InoueYuichi Inoue (101 patents)Yohei NakanishiYohei Nakanishi (99 patents)Kazutaka HanaokaKazutaka Hanaoka (99 patents)Yoshikazu TanakaYoshikazu Tanaka (74 patents)Kazuya UedaKazuya Ueda (63 patents)Norio SugiuraNorio Sugiura (62 patents)Kimiaki NakamuraKimiaki Nakamura (51 patents)Kenichi OkadaKenichi Okada (21 patents)Shinpei NagataniShinpei Nagatani (21 patents)Isao HiroseIsao Hirose (12 patents)Seiji HayashimotoSeiji Hayashimoto (11 patents)Toshiyuki UmeharaToshiyuki Umehara (11 patents)Toshitaka SuzukiToshitaka Suzuki (8 patents)Masaru IshiwaMasaru Ishiwa (8 patents)Koshu YonemuraKoshu Yonemura (8 patents)Hiroshi SugawaHiroshi Sugawa (7 patents)Hideo HaraHideo Hara (7 patents)Kooki OoyamaKooki Ooyama (6 patents)Masayoshi NatsumeMasayoshi Natsume (5 patents)Shou UchidaShou Uchida (5 patents)Masakazu MorimotoMasakazu Morimoto (5 patents)Tomohide BambaTomohide Bamba (4 patents)Toru InamasuToru Inamasu (4 patents)Ryo TanakaRyo Tanaka (4 patents)Hiroyoshi TakahashiHiroyoshi Takahashi (4 patents)Tadao ToriiTadao Torii (3 patents)Kazumasa KaiwaKazumasa Kaiwa (3 patents)Ikkou HanakiIkkou Hanaki (2 patents)Hiroyoshi OnishiHiroyoshi Onishi (2 patents)Masayuki NagataMasayuki Nagata (2 patents)Ryohei SawazakiRyohei Sawazaki (2 patents)Kouichi KatagawaKouichi Katagawa (1 patent)Akifumi KidoAkifumi Kido (0 patent)Jiro YamatoJiro Yamato (0 patent)Kouhei TakedaKouhei Takeda (0 patent)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Sharp Kabushiki Kaisha Corporation (26 from 25,530 patents)

2. Fujitsu Corporation (13 from 39,228 patents)

3. Nitto-denko Corporation (9 from 3,868 patents)

4. Kansai Paint Company, Ltd. (4 from 861 patents)

5. Other (3 from 832,680 patents)

6. Fujitsu Display Technologies Corporation (3 from 103 patents)

7. Au Optronics Corporation (1 from 4,573 patents)

8. Fujitsu Kasei Limited (1 from 6 patents)


54 patents:

1. 11945984 - Reinforcing film

2. 11492520 - Reinforcing film

3. 9089930 - Surface protection sheet for laser material processing

4. 8794779 - Lighting device, display device and television receiver

5. 8791966 - Display device and electric apparatus

6. 8556455 - Lighting device, display device and television receiver

7. 8415898 - Connector, a lamp connector, a lamp connection checking circuit, and an illumination device

8. 8417127 - Infrared communications receiver

9. 8406632 - Infrared communications receiver

10. 8267536 - Power supply unit and display device

11. 8263220 - Work subject material, surface protection sheet and method of working

12. 8253681 - Light source device, a display device and a television receiver

13. 8111225 - Liquid crystal display device having a plurality of subfields

14. 8093816 - Cold cathode tube lamp

15. 8049711 - Illumination device and liquid crystal display device using the same

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12/7/2025
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