Growing community of inventors

Kanagawa, Japan

Kiyohisa Koyama

Average Co-Inventor Count = 2.40

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 = 32

Kiyohisa KoyamaMasaichi Sawada (2 patents)Kiyohisa KoyamaKeiichi Suzuki (1 patent)Kiyohisa KoyamaAkira Takehisa (1 patent)Kiyohisa KoyamaYouichi Onodera (1 patent)Kiyohisa KoyamaKiyohisa Koyama (3 patents)Masaichi SawadaMasaichi Sawada (13 patents)Keiichi SuzukiKeiichi Suzuki (47 patents)Akira TakehisaAkira Takehisa (7 patents)Youichi OnoderaYouichi Onodera (1 patent)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Ricoh Company, Ltd. (3 from 28,546 patents)


3 patents:

1. 7035554 - Image forming device and remote monitoring system for the same

2. 6947675 - Remote maintenance and diagnosis of office or domestic appliances

3. 6876819 - Image forming device and remote monitoring system for the same

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as of
12/14/2025
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