Growing community of inventors

Hachioji, Japan

Koichi Matsumoto

Average Co-Inventor Count = 3.00

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 = 5

Koichi Matsumoto ↔ Kazuo Shiozawa (1 patent)Koichi Matsumoto ↔ Kiyoaki Hazama (1 patent)Koichi MatsumotoKoichi Matsumoto (1 patent)Kazuo ShiozawaKazuo Shiozawa (21 patents)Kiyoaki HazamaKiyoaki Hazama (4 patents)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Konishiroku Photo Industry Co., Ltd. (1 from 1,252 patents)


1 patent:

1. 4365881 - Photographic camera with timepiece

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as of
12/13/2025
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