Growing community of inventors

Osaka, Japan

Kenzou Kassai

Average Co-Inventor Count = 1.17

ph-index = 31

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 = 3,391

Kenzou KassaiIchiro Ohnishi (15 patents)Kenzou KassaiIchiro Onishi (11 patents)Kenzou KassaiHiroyasu Yamamoto (8 patents)Kenzou KassaiKeiji Inoue (7 patents)Kenzou KassaiMiyuki Nishikura (3 patents)Kenzou KassaiYoshifumi Yoneda (2 patents)Kenzou KassaiSachiyo Suzuki (2 patents)Kenzou KassaiHaruo Kawano (2 patents)Kenzou KassaiAtsuyoshi Yoshida (2 patents)Kenzou KassaiFumiko Takahashi (2 patents)Kenzou KassaiKazunori Sawada (1 patent)Kenzou KassaiKoichi Yokoyama (1 patent)Kenzou KassaiYuji Nitta (1 patent)Kenzou KassaiYasuhito Kassai (1 patent)Kenzou KassaiFumiyo Yamazoe (1 patent)Kenzou KassaiTsuguhiro Fukuda (1 patent)Kenzou KassaiYamei Liu (1 patent)Kenzou KassaiKaichi Fujimoto (1 patent)Kenzou KassaiMasaki Ito (1 patent)Kenzou KassaiToshio Oonuma (1 patent)Kenzou KassaiMakoto Fukui (1 patent)Kenzou KassaiKeiji Inoue (0 patent)Kenzou KassaiMasaki Yamamoto (0 patent)Kenzou KassaiTakanori Tanaka (0 patent)Kenzou KassaiKenzou Kassai (194 patents)Ichiro OhnishiIchiro Ohnishi (25 patents)Ichiro OnishiIchiro Onishi (20 patents)Hiroyasu YamamotoHiroyasu Yamamoto (8 patents)Keiji InoueKeiji Inoue (7 patents)Miyuki NishikuraMiyuki Nishikura (3 patents)Yoshifumi YonedaYoshifumi Yoneda (4 patents)Sachiyo SuzukiSachiyo Suzuki (2 patents)Haruo KawanoHaruo Kawano (2 patents)Atsuyoshi YoshidaAtsuyoshi Yoshida (2 patents)Fumiko TakahashiFumiko Takahashi (2 patents)Kazunori SawadaKazunori Sawada (6 patents)Koichi YokoyamaKoichi Yokoyama (1 patent)Yuji NittaYuji Nitta (1 patent)Yasuhito KassaiYasuhito Kassai (1 patent)Fumiyo YamazoeFumiyo Yamazoe (1 patent)Tsuguhiro FukudaTsuguhiro Fukuda (1 patent)Yamei LiuYamei Liu (1 patent)Kaichi FujimotoKaichi Fujimoto (1 patent)Masaki ItoMasaki Ito (1 patent)Toshio OonumaToshio Oonuma (1 patent)Makoto FukuiMakoto Fukui (1 patent)Keiji InoueKeiji Inoue (0 patent)Masaki YamamotoMasaki Yamamoto (0 patent)Takanori TanakaTakanori Tanaka (0 patent)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Aprica Kassai Kabushikikaisha (122 from 136 patents)

2. Kassai Kabushikikaisha (55 from 57 patents)

3. Aprica Ikujikenkyukai Aprica Kassai Kabushikikaisha (6 from 7 patents)

4. Other (4 from 832,575 patents)

5. Graco Children's Products, Inc. (3 from 381 patents)

6. Aprica Children's Products Inc. (2 from 11 patents)

7. Aprica Ikujikenkyukai Aprica Kassai Kabushikaisha (1 from 1 patent)


194 patents:

1. 7753445 - Automobile child seat

2. 7585026 - Seat of child-care instrument

3. 7493835 - Newborn dummy

4. 7494031 - Nursery band

5. 7484801 - Detachable child safety seat

6. 7458599 - Luggage basket and folding baby carriage provided with the same

7. D580307 - Baby carriage

8. 7445230 - Baby carriage

9. 7445281 - Head guard structure and head guard pad of child equipment, and vehicular child safety seat

10. 7419181 - Foldable carriage body for carrying a seat

11. 7204550 - Seat of childcare apparatus

12. 7175004 - Wheel simultaneous brake mechanism and caster rotation preventing mechanism having simple mechanism

13. 7140634 - Foldable baby carriage

14. 7118173 - Baby-care implement provided with hood

15. 7114743 - Foldable baby carriage

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11/21/2025
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