Growing community of inventors

Tokyo, Japan

Keiichiro Kumagai

Average Co-Inventor Count = 1.14

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 = 59

Keiichiro KumagaiMitsuru Kuroda (1 patent)Keiichiro KumagaiKeiichiro Kumagai (4 patents)Mitsuru KurodaMitsuru Kuroda (16 patents)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Nec Corporation (4 from 35,689 patents)


4 patents:

1. 7238038 - Card holding structure for portable electronic device

2. 6644822 - Light diffusion unit

3. 6462803 - Display panel structure with a reinforced sealing member

4. 6314274 - Portable radio having retractable keys, wherein the keys retract within the housing upon movement of a retraction accuator

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as of
12/21/2025
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