Growing community of inventors

Osaka, Japan

Keiji Sakata

Average Co-Inventor Count = 1.36

ph-index = 9

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 = 148

Keiji Sakata ↔ Masafumi Yamagami (4 patents)Keiji Sakata ↔ Hiroshi Sakaguchi (1 patent)Keiji Sakata ↔ Takahisa Yubisui (1 patent)Keiji Sakata ↔ Tsutomu Yamasaki (1 patent)Keiji Sakata ↔ Akira Esaki (1 patent)Keiji Sakata ↔ Megumi Shinohara (1 patent)Keiji SakataKeiji Sakata (13 patents)Masafumi YamagamiMasafumi Yamagami (34 patents)Hiroshi SakaguchiHiroshi Sakaguchi (88 patents)Takahisa YubisuiTakahisa Yubisui (34 patents)Tsutomu YamasakiTsutomu Yamasaki (15 patents)Akira EsakiAkira Esaki (6 patents)Megumi ShinoharaMegumi Shinohara (2 patents)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Sharp Corporation (13 from 847 patents)


13 patents:

1. D281171 - Electronic calculator

2. D279109 - Calculator

3. D274822 - Electronic calculator

4. D274439 - Electronic calculator

5. D273502 - Electronic calculator

6. D273392 - Electronic calculator

7. D273304 - Electronic calculator

8. D273306 - Electronic calculator

9. D273201 - Electronic calculator

10. D273200 - Electronic calculator with solar batteries

11. D270646 - Electronic calculator

12. D269624 - Electronic calculator

13. D267799 - Facsimile transceiver

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as of
12/19/2025
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