Growing community of inventors

Hamamatsu, Japan

Tomoyuki Kumagai

Average Co-Inventor Count = 1.24

ph-index = 4

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 = 36

Tomoyuki KumagaiHiroyuki Iwase (1 patent)Tomoyuki KumagaiYoshihisa Ito (1 patent)Tomoyuki KumagaiTadasu Kakizaki (1 patent)Tomoyuki KumagaiTomoyuki Kumagai (6 patents)Hiroyuki IwaseHiroyuki Iwase (29 patents)Yoshihisa ItoYoshihisa Ito (11 patents)Tadasu KakizakiTadasu Kakizaki (3 patents)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Yamaha Corporation (6 from 5,450 patents)


6 patents:

1. 6232541 - Data sending apparatus and data receiving apparatus communicating data storage control command in MIDI protocol, and method therefor

2. 6103965 - Musical tone synthesizing apparatus, musical tone synthesizing method

3. 5864081 - Musical tone generating apparatus, musical tone generating method and

4. 5623112 - Automatic performance device

5. 5340939 - Instrument having multiple data storing tracks for playing back musical

6. 5274192 - Instrument for recording and playing back musical playing data

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as of
12/11/2025
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