Growing community of inventors

Tokyo, Japan

Keiji Chikuma

Average Co-Inventor Count = 1.80

ph-index = 7

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 = 183

Keiji ChikumaTakaharu Ando (2 patents)Keiji ChikumaMasao Isshiki (2 patents)Keiji ChikumaAkihiko Konno (2 patents)Keiji ChikumaYusuke Kawai (2 patents)Keiji ChikumaShinji Watanabe (2 patents)Keiji ChikumaYuji Hirooka (1 patent)Keiji ChikumaKeiji Chikuma (7 patents)Takaharu AndoTakaharu Ando (35 patents)Masao IsshikiMasao Isshiki (33 patents)Akihiko KonnoAkihiko Konno (18 patents)Yusuke KawaiYusuke Kawai (11 patents)Shinji WatanabeShinji Watanabe (11 patents)Yuji HirookaYuji Hirooka (1 patent)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Kabushiki Kaisha Toshiba (7 from 52,730 patents)


7 patents:

1. D706767 - Electronic computer

2. D706769 - Electronic computer

3. D649964 - Portion of an electronic computer

4. D407755 - Information guide display device

5. D402652 - Portable radio telephone

6. D401973 - Information guide display device

7. D392635 - Portable radio telephone

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as of
12/21/2025
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