Growing community of inventors

Tokyo, Japan

Naofumi Hirayama

Average Co-Inventor Count = 4.44

ph-index = 3

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 = 91

Naofumi HirayamaMizuki Tomono (3 patents)Naofumi HirayamaYoshinori Nakatsuka (2 patents)Naofumi HirayamaKatsumi Kobayashi (2 patents)Naofumi HirayamaMikiko Arakawa (2 patents)Naofumi HirayamaTakeshi Igarashi (1 patent)Naofumi HirayamaTatsufumi Funayama (1 patent)Naofumi HirayamaMineki Miyasaka (1 patent)Naofumi HirayamaYohei Nakajima (1 patent)Naofumi HirayamaDaisuke Suma (1 patent)Naofumi HirayamaNaofumi Hirayama (4 patents)Mizuki TomonoMizuki Tomono (13 patents)Yoshinori NakatsukaYoshinori Nakatsuka (5 patents)Katsumi KobayashiKatsumi Kobayashi (2 patents)Mikiko ArakawaMikiko Arakawa (2 patents)Takeshi IgarashiTakeshi Igarashi (60 patents)Tatsufumi FunayamaTatsufumi Funayama (12 patents)Mineki MiyasakaMineki Miyasaka (4 patents)Yohei NakajimaYohei Nakajima (1 patent)Daisuke SumaDaisuke Suma (1 patent)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Pioneer Corporation (3 from 2,649 patents)

2. Pioneer Design Corporation (2 from 9 patents)

3. Other (1 from 832,912 patents)


4 patents:

1. 7751970 - Information providing apparatus, information providing method, and computer product

2. 6882326 - Portable information terminal

3. 6876871 - Portable information terminal

4. 6807276 - Portable telephone

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as of
1/10/2026
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