Average Co-Inventor Count = 3.00
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 (3 from 5,452 patents)
3 patents:
1. 7982120 - Performance apparatus and storage medium therefor
2. 7956274 - Performance apparatus and storage medium therefor
3. 7853428 - Apparatus for displaying fitness exercise condition