Growing community of inventors

Tokyo, Japan

Harukaze Koga

Average Co-Inventor Count = 1.50

ph-index = 4

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 = 58

Harukaze KogaTakeshi Inoue (2 patents)Harukaze KogaKazuhiko Arai (2 patents)Harukaze KogaHarukaze Koga (4 patents)Takeshi InoueTakeshi Inoue (53 patents)Kazuhiko AraiKazuhiko Arai (7 patents)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Combi Corporation (4 from 192 patents)


4 patents:

1. D480120 - Exercise stationary bike

2. D479865 - Exercise stationary bike

3. D360916 - Ergometer

4. D343879 - Stair climbing exercise machine

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as of
1/21/2026
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