Average Co-Inventor Count = 1.71
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 58,131 patents)
2. Sony Trans Com Inc. (2 from 52 patents)
2 patents:
1. 6134674 - Computer based test operating system
2. 5675752 - Interactive applications generator for an interactive presentation