Average Co-Inventor Count = 3.00
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 Computer Entertainment Inc. (2 from 1,799 patents)
2 patents:
1. 6674438 - Method of and system for adding information and recording medium
2. 6595860 - Portable information terminal and recording medium