Average Co-Inventor Count = 1.33
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 (4 from 5,452 patents)
4 patents:
1. 11887569 - Performance system, performance mode setting method, and performance mode setting device
2. 9514728 - Musical performance apparatus that emits musical performance tones and control tones for controlling an apparatus
3. 8697976 - Parameter setting apparatus having separate operators for course and fine adjustments for the same parameter
4. 8203066 - Pedal apparatus and electronic keyboard apparatus having the same