Average Co-Inventor Count = 3.75
ph-index = 1
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 (2 from 5,452 patents)
2 patents:
1. 11804202 - Electronic wind instrument
2. 10354630 - Performance information processing device and method