Growing community of inventors

Hiroshima, Japan

Keiji Koga

Average Co-Inventor Count = 8.00

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 = 9

Keiji KogaTakehiro Yamamoto (3 patents)Keiji KogaTadashi Okamoto (3 patents)Keiji KogaHideaki Yasuda (3 patents)Keiji KogaHiroshi Mayumi (3 patents)Keiji KogaMorihito Tsukuda (3 patents)Keiji KogaKenichiro Higashi (3 patents)Keiji KogaYoshinori Aono (3 patents)Keiji KogaKeiji Koga (3 patents)Takehiro YamamotoTakehiro Yamamoto (5 patents)Tadashi OkamotoTadashi Okamoto (4 patents)Hideaki YasudaHideaki Yasuda (4 patents)Hiroshi MayumiHiroshi Mayumi (3 patents)Morihito TsukudaMorihito Tsukuda (3 patents)Kenichiro HigashiKenichiro Higashi (3 patents)Yoshinori AonoYoshinori Aono (3 patents)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Japan Climate Systems Corporation (3 from 25 patents)


3 patents:

1. 7942192 - Vehicle air conditioner

2. 7886814 - Vehicle air conditioner

3. 7100675 - Air conditioner for vehicle

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as of
1/7/2026
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