Growing community of inventors

Tokyo, Japan

Keiji Ohya

Average Co-Inventor Count = 2.32

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 = 129

Keiji OhyaToshie Hiraoka (6 patents)Keiji OhyaYuki Nagai (1 patent)Keiji OhyaKatsumasa Sakamoto (1 patent)Keiji OhyaNaho Misumi (1 patent)Keiji OhyaKeiji Ohya (6 patents)Toshie HiraokaToshie Hiraoka (11 patents)Yuki NagaiYuki Nagai (10 patents)Katsumasa SakamotoKatsumasa Sakamoto (6 patents)Naho MisumiNaho Misumi (4 patents)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Mitsubishi Denki Kabushiki Kaisha (6 from 21,351 patents)


6 patents:

1. 6637235 - Fridge-freezer

2. 6526766 - Refrigerator and method of operating refrigerator

3. 6405544 - Refrigerator and method of operating refrigerator

4. 6405547 - Refrigerator and method of operating refrigerator

5. 6401481 - Refrigerator and method of operating refrigerator

6. 6314746 - Refrigerator with a freezer compartment and method of using it

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as of
12/8/2025
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