Growing community of inventors

Fujisawa, Japan

Ken Katayama

Average Co-Inventor Count = 4.00

ph-index = 1

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 = 24

Ken KatayamaTakahide Wada (1 patent)Ken KatayamaYukifumi Nakazawa (1 patent)Ken KatayamaYoshio Nishioka (1 patent)Ken KatayamaKen Katayama (1 patent)Takahide WadaTakahide Wada (8 patents)Yukifumi NakazawaYukifumi Nakazawa (4 patents)Yoshio NishiokaYoshio Nishioka (1 patent)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. International Business Machines Corporation (1 from 164,108 patents)


1 patent:

1. 6561668 - Computer with keyboard illuminator for use in operating environments with inadequate ambient lighting conditions

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as of
12/4/2025
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