Growing community of inventors

Yokohama, Japan

Koji Yokoyama

Average Co-Inventor Count = 1.88

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 = 31

Koji YokoyamaJunichi Shinohara (5 patents)Koji YokoyamaHiroshi Morohoshi (5 patents)Koji YokoyamaMayu Takano (5 patents)Koji YokoyamaKoji Yokoyama (8 patents)Junichi ShinoharaJunichi Shinohara (33 patents)Hiroshi MorohoshiHiroshi Morohoshi (19 patents)Mayu TakanoMayu Takano (9 patents)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Ricoh Company, Ltd. (7 from 28,559 patents)

2. Ricoh Corporation (1 from 233 patents)


8 patents:

1. 9338360 - Imaging apparatus

2. 8639103 - Imaging apparatus

3. 8422873 - Imaging apparatus

4. 8204369 - Imaging apparatus

5. 7907836 - Imaging apparatus

6. 7442075 - Battery contact mechanism, battery receiving structure, electric power unit, electronic equipment, and pressure-contacting mechanism

7. 7247048 - Battery contact mechanism, battery receiving structure, electric power unit, electronic equipment, and pressure-contacting mechanism

8. 6067172 - Terminal coupled to integrated services digital network having

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as of
12/17/2025
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