Average Co-Inventor Count = 3.31
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.
Company Filing History:
1. Yamaha Corporation (6 from 5,450 patents)
2. Nippon Gakki Seizo Kabushiki Kaisha (1 from 841 patents)
7 patents:
1. 7312390 - Automatic music playing apparatus and computer program therefor
2. 7301091 - Performance data transmission controlling apparatus, and electronic musical instrument capable of acquiring performance data
3. 7253351 - Performance data transmission controlling apparatus, and electronic musical instrument capable of acquiring performance data
4. 7196259 - Performance data transmission controlling apparatus and electronic musical instrument capable of acquiring performance data
5. 5410941 - Electronic musical instrument having an external memory device
6. 4843934 - Rhythm tone source assigning apparatus for use in electronic musical
7. 4672876 - Rhythm tone source assigning apparatus for use in electronic musical