Growing community of inventors

Hamamatsu, Japan

Youji Semba

Average Co-Inventor Count = 1.86

ph-index = 8

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 = 683

Youji SembaHirokazu Kato (2 patents)Youji SembaKanehisa Tsurumi (2 patents)Youji SembaYuichi Murai (2 patents)Youji SembaKatsuji Yoshimura (1 patent)Youji SembaMinoru Ogita (1 patent)Youji SembaYukio Tada (1 patent)Youji SembaTakuro Sone (1 patent)Youji SembaShinji Koezuka (1 patent)Youji SembaHiroyuki Fujita (1 patent)Youji SembaYasuo Kageyama (1 patent)Youji SembaKiyohisa Sugii (1 patent)Youji SembaMasashi Tashiro (1 patent)Youji SembaNaohiro Kosugi (1 patent)Youji SembaYouji Semba (13 patents)Hirokazu KatoHirokazu Kato (21 patents)Kanehisa TsurumiKanehisa Tsurumi (12 patents)Yuichi MuraiYuichi Murai (3 patents)Katsuji YoshimuraKatsuji Yoshimura (72 patents)Minoru OgitaMinoru Ogita (39 patents)Yukio TadaYukio Tada (18 patents)Takuro SoneTakuro Sone (16 patents)Shinji KoezukaShinji Koezuka (10 patents)Hiroyuki FujitaHiroyuki Fujita (8 patents)Yasuo KageyamaYasuo Kageyama (7 patents)Kiyohisa SugiiKiyohisa Sugii (6 patents)Masashi TashiroMasashi Tashiro (2 patents)Naohiro KosugiNaohiro Kosugi (1 patent)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Yamaha Corporation (13 from 5,451 patents)


13 patents:

1. 10028015 - Signal processing apparatus and signal processing method

2. 8064614 - Audio signal delivery management system, audio signal acquiring and transmitting apparatus, audio signal identifying and outputting apparatus, and audio signal delivering apparatus

3. 5997308 - Apparatus for displaying words in a karaoke system

4. 5974387 - Audio recompression from higher rates for karaoke, video games, and

5. 5931680 - Score information display apparatus

6. 5929359 - Karaoke apparatus with concurrent start of audio and video upon request

7. 5890910 - Method of managing information files in a communication karaoke

8. 5824934 - Karaoke system including host apparatus that downloads information file

9. 5810603 - Karaoke network system with broadcasting of background pictures

10. 5654516 - Karaoke system having a playback source with pre-stored data and a music

11. 5542000 - Karaoke apparatus having automatic effector control

12. 5410097 - Karaoke apparatus with skip and repeat operation of orchestra

13. 5229756 - Image control apparatus

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as of
12/18/2025
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