Growing community of inventors

Hashimoto, Japan

Keiji Kumatani

Average Co-Inventor Count = 4.00

ph-index = 2

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 = 6

Keiji KumataniHidenori Kawanishi (2 patents)Keiji KumataniAtsushi Shimonaka (2 patents)Keiji KumataniToshihiro Inooka (2 patents)Keiji KumataniKeiji Kumatani (2 patents)Hidenori KawanishiHidenori Kawanishi (61 patents)Atsushi ShimonakaAtsushi Shimonaka (21 patents)Toshihiro InookaToshihiro Inooka (2 patents)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Sharp Kabushiki Kaisha Corporation (2 from 25,577 patents)


2 patents:

1. 7756181 - Semiconductor laser device, optical transmission device, optical transmission system, electronic device, control device, connector, communication device, and optical transmission method and data transmission and reception method

2. 6888864 - SEMICONDUCTOR LASER DEVICE, OPTICAL TRANSMISSION DEVICE, OPTICAL TRANSMISSION SYSTEM, ELECTRONIC DEVICE, CONTROL DEVICE, CONNECTOR, COMMUNICATION DEVICE, AND OPTICAL TRANSMISSION METHOD AND DATA TRANSMISSION AND RECEPTION METHOD

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1/9/2026
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