Average Co-Inventor Count = 7.00
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 58,132 patents)
2. Sony Electronics Inc (2 from 2,335 patents)
2 patents:
1. 8239961 - Digital rights management using trusted time
2. 7861308 - Digital rights management using trusted time