Growing community of inventors

Tokyo, Japan

Keiichi Hayashi

Average Co-Inventor Count = 1.19

ph-index = 5

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 = 145

Keiichi HayashiMasanori Ikari (1 patent)Keiichi HayashiAtsushi Shimizu (1 patent)Keiichi HayashiHiroto Nagai (1 patent)Keiichi HayashiNoriyasu Sakajiri (1 patent)Keiichi HayashiHirotaka Kamekura (1 patent)Keiichi HayashiHidetoshi Ohta (1 patent)Keiichi HayashiTakashi Tanikawa (1 patent)Keiichi HayashiTakahiro Hirama (0 patent)Keiichi HayashiKeiichi Hayashi (15 patents)Masanori IkariMasanori Ikari (46 patents)Atsushi ShimizuAtsushi Shimizu (8 patents)Hiroto NagaiHiroto Nagai (3 patents)Noriyasu SakajiriNoriyasu Sakajiri (3 patents)Hirotaka KamekuraHirotaka Kamekura (2 patents)Hidetoshi OhtaHidetoshi Ohta (1 patent)Takashi TanikawaTakashi Tanikawa (1 patent)Takahiro HiramaTakahiro Hirama (0 patent)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Nec Corporation (12 from 35,658 patents)

2. Komatsu Corporation (2 from 2,730 patents)

3. Power Systems Co., Ltd. (1 from 5 patents)


15 patents:

1. 12024856 - Work machine

2. 11492781 - Work vehicle

3. 7783324 - Mobile communication system and devices used therefor

4. 7228126 - Portable communication terminal and method of transmission of electronic mail

5. 7214249 - Method for conducting electric activation of electric double layer capacitors

6. 7151924 - Communication system, hold control method therefor, telephone set, control method therefor and recording medium

7. 7017115 - Portable information terminal equipment and display method therefor

8. 6963761 - System and method for sounding a music accompanied by light or vibration

9. 6792453 - Information terminal unit, character input control method to be used in the same, and storage medium recording control program therefor

10. 6717531 - Keyboard device and a method of controlling a power supply incorporated in the keyboard device

11. 6650913 - Mobile telephone unit and method used in this unit for accessing internet site

12. 6321094 - Access method through radio mobile communication system

13. 6282612 - Removable memory device for portable terminal device

14. 6192259 - Portable radio apparatus having function for compressing and transmitting data

15. 5889604 - Method of and apparatus for data communications between portable

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as of
12/7/2025
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