Growing community of inventors

Kanagawa, Japan

Mikiharu Matsumoto

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 = 3

Mikiharu MatsumotoMasato Yamagata (1 patent)Mikiharu MatsumotoMikiharu Matsumoto (1 patent)Masato YamagataMasato Yamagata (11 patents)
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Inventor’s number of patents
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Strength of working relationships

Company Filing History:

1. Sony Corporation (1 from 58,130 patents)


1 patent:

1. 6542603 - Telephone answering unit with caller ID and variable ring sounds

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as of
12/20/2025
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