Growing community of inventors

Tokyo, Japan

Yuichi Murai

Average Co-Inventor Count = 3.00

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 = 72

Yuichi MuraiKanehisa Tsurumi (3 patents)Yuichi MuraiYouji Semba (2 patents)Yuichi MuraiEmi Ito (1 patent)Yuichi MuraiYuichi Murai (3 patents)Kanehisa TsurumiKanehisa Tsurumi (12 patents)Youji SembaYouji Semba (13 patents)Emi ItoEmi Ito (2 patents)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Yamaha Corporation (3 from 5,451 patents)


3 patents:

1. 5890910 - Method of managing information files in a communication karaoke

2. 5833469 - Method of operating a karaoke network system with system program

3. 5824934 - Karaoke system including host apparatus that downloads information file

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as of
12/20/2025
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