Growing community of inventors

Anjo, Japan

Norifumi Niwa

Average Co-Inventor Count = 2.29

ph-index = 13

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 = 667

Norifumi NiwaManabu Sugimoto (3 patents)Norifumi NiwaShinsuke Okuda (2 patents)Norifumi NiwaShingo Umemura (2 patents)Norifumi NiwaKazuma Oshima (2 patents)Norifumi NiwaMasaki Kondo (1 patent)Norifumi NiwaNaohiro Hayakawa (1 patent)Norifumi NiwaKazuyuki Sakakibara (1 patent)Norifumi NiwaMasahiko Inai (1 patent)Norifumi NiwaTakuo Arakawa (1 patent)Norifumi NiwaTakefumi Furuta (1 patent)Norifumi NiwaKatsumi Tozawa (1 patent)Norifumi NiwaMasamichi Miyazawa (1 patent)Norifumi NiwaMakoto Mizutani (1 patent)Norifumi NiwaToru Horiyama (1 patent)Norifumi NiwaAkinori Kimata (1 patent)Norifumi NiwaIsao Miyashita (1 patent)Norifumi NiwaTadayoshi Tsuchiya (1 patent)Norifumi NiwaTaro Nagahama (1 patent)Norifumi NiwaTohru Horiyama (1 patent)Norifumi NiwaHiroshi Fujimoto (1 patent)Norifumi NiwaNorifumi Niwa (16 patents)Manabu SugimotoManabu Sugimoto (22 patents)Shinsuke OkudaShinsuke Okuda (91 patents)Shingo UmemuraShingo Umemura (12 patents)Kazuma OshimaKazuma Oshima (7 patents)Masaki KondoMasaki Kondo (92 patents)Naohiro HayakawaNaohiro Hayakawa (51 patents)Kazuyuki SakakibaraKazuyuki Sakakibara (44 patents)Masahiko InaiMasahiko Inai (19 patents)Takuo ArakawaTakuo Arakawa (14 patents)Takefumi FurutaTakefumi Furuta (12 patents)Katsumi TozawaKatsumi Tozawa (9 patents)Masamichi MiyazawaMasamichi Miyazawa (9 patents)Makoto MizutaniMakoto Mizutani (9 patents)Toru HoriyamaToru Horiyama (8 patents)Akinori KimataAkinori Kimata (7 patents)Isao MiyashitaIsao Miyashita (7 patents)Tadayoshi TsuchiyaTadayoshi Tsuchiya (6 patents)Taro NagahamaTaro Nagahama (1 patent)Tohru HoriyamaTohru Horiyama (1 patent)Hiroshi FujimotoHiroshi Fujimoto (1 patent)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Makita Corporation (15 from 2,205 patents)

2. Nakita Corporation (1 from 1 patent)


16 patents:

1. D530176 - Portable electric wrench

2. D481672 - Battery pack

3. D477811 - Battery pack

4. 6502949 - Adapters for use with an electric power tool

5. D431437 - Sander

6. D415400 - Power shears

7. D411947 - Portable electric screwdriver

8. D411425 - Cordless circular saw

9. D409469 - Portable electric jig saw

10. D395586 - Portable electric hammer

11. D392863 - Cordless impact driver

12. D392490 - Automatic venetian blind opener and closer

13. D388676 - Concrete vibrator body

14. D386662 - Portable electric screwdriver

15. D385766 - Portable electric chain saw

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as of
1/8/2026
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