Growing community of inventors

Kitakyushu, Japan

Tsutomu Iwanaga

Average Co-Inventor Count = 1.67

ph-index = 3

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 = 33

Tsutomu IwanagaKatsuhiko Nishizaka (3 patents)Tsutomu IwanagaHisataka Kugimachi (3 patents)Tsutomu IwanagaTsutomu Iwanaga (5 patents)Katsuhiko NishizakaKatsuhiko Nishizaka (13 patents)Hisataka KugimachiHisataka Kugimachi (5 patents)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Seiko Epson Corporation (5 from 33,490 patents)


5 patents:

1. 8757747 - Image forming apparatus

2. 8282187 - Liquid discharging apparatus

3. 8152263 - Printer

4. 8147021 - Printer

5. 7607748 - Printer

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as of
1/9/2026
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