Growing community of inventors

Hitachi, Japan

Hisashi Umetsu

Average Co-Inventor Count = 5.00

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 = 0

Hisashi Umetsu ↔ Akira Miyao (1 patent)Hisashi Umetsu ↔ Nobuhiro Harada (1 patent)Hisashi Umetsu ↔ Takuya Moriai (1 patent)Hisashi Umetsu ↔ Koji Horikawa (1 patent)Hisashi UmetsuHisashi Umetsu (1 patent)Akira MiyaoAkira Miyao (24 patents)Nobuhiro HaradaNobuhiro Harada (15 patents)Takuya MoriaiTakuya Moriai (3 patents)Koji HorikawaKoji Horikawa (1 patent)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Hitachi Industrial Equipment Systems Co., Ltd. (1 from 495 patents)


1 patent:

1. 8764169 - Inkjet recording device and printing head

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as of
12/26/2025
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