Average Co-Inventor Count = 2.27
ph-index = 2
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 (5 from 5,450 patents)
5 patents:
1. 8222508 - Tone signal creating apparatus and method
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. 7247787 - Electronic musical instrument
5. 7196259 - Performance data transmission controlling apparatus and electronic musical instrument capable of acquiring performance data