Growing community of inventors

Yokohama, Japan

Tomohisa Hamakawa

Average Co-Inventor Count = 2.00

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 = 92

Tomohisa HamakawaHirofumi Muratani (1 patent)Tomohisa HamakawaTomohisa Hamakawa (1 patent)Hirofumi MurataniHirofumi Muratani (38 patents)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Digital Vision Laboratories Corporation (1 from 11 patents)


1 patent:

1. 6119109 - Information distribution system and billing system used for the

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12/9/2025
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