Average Co-Inventor Count = 5.52
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. Sony Corporation (2 from 58,129 patents)
2. Hitachi, Ltd. (2 from 42,488 patents)
4 patents:
1. 10606581 - Management system for creating service
2. 10360013 - Management system for creating service
3. 8126181 - Acoustic system
4. 7313800 - Disk centering system