Growing community of inventors

Tokyo, Japan

Narumi Machida

Average Co-Inventor Count = 3.00

ph-index = 3

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 = 20

Narumi MachidaYasufumi Fukuma (3 patents)Narumi MachidaTakeyuki Kato (3 patents)Narumi MachidaNarumi Machida (3 patents)Yasufumi FukumaYasufumi Fukuma (115 patents)Takeyuki KatoTakeyuki Kato (24 patents)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Kabushiki Kaisha Topcon (2 from 1,033 patents)

2. Other (1 from 832,843 patents)


3 patents:

1. 7292713 - Eye test service system

2. 7274806 - Service system for selecting personal goods to wear or carry, and program product therefor

3. 7010146 - Database constructing system

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as of
12/29/2025
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