Growing community of inventors

Tochigi-ken, Japan

Munehiko Doi

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 = 6

Munehiko Doi ↔ Fujio Anzai (1 patent)Munehiko Doi ↔ Genshin Kojima (1 patent)Munehiko DoiMunehiko Doi (1 patent)Fujio AnzaiFujio Anzai (2 patents)Genshin KojimaGenshin Kojima (1 patent)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Nippon Piston Ring Co., Ltd. (1 from 229 patents)


1 patent:

1. 6220214 - Cylinder liner formed with cross-hatching grooves

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as of
12/18/2025
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