Growing community of inventors

Akishima, Japan

Kei Ooyama

Average Co-Inventor Count = 1.20

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 = 24

Kei OoyamaTakashi Hasegawa (1 patent)Kei OoyamaKei Ooyama (3 patents)Takashi HasegawaTakashi Hasegawa (2 patents)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. France Bed Co., Ltd. (3 from 57 patents)


3 patents:

1. 9693914 - Wheelchair

2. 9027948 - Brake-equipped wheelchair

3. 7017210 - Rising-type bed apparatus and mattress

Please report any incorrect information to support@idiyas.com
idiyas.com
as of
12/16/2025
Loading…