Average Co-Inventor Count = 1.38
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 (3 from 58,132 patents)
3 patents:
1. 9414040 - Method and system for assisting language learning
2. 8761574 - Method and system for assisting language learning
3. 8438057 - Unified onscreen advertisement system for CE devices