Growing community of inventors

Shiga-ken, Japan

Keiko Oyabu

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 = 7

Keiko OyabuMitsuo Nakanuma (1 patent)Keiko OyabuKoji Hatano (1 patent)Keiko OyabuTaii Tsuji (1 patent)Keiko OyabuMasami Hayashi (1 patent)Keiko OyabuKeiko Oyabu (2 patents)Mitsuo NakanumaMitsuo Nakanuma (10 patents)Koji HatanoKoji Hatano (10 patents)Taii TsujiTaii Tsuji (3 patents)Masami HayashiMasami Hayashi (1 patent)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Matsushita Electric Industrial Co., Ltd. (2 from 27,375 patents)


2 patents:

1. 6227001 - Separate type air conditioner

2. 6094928 - Outdoor unit of separate type air conditioner

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as of
12/19/2025
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