Average Co-Inventor Count = 14.01
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. Hitachi, Ltd. (42,508 patents)
2 patents:
1. 7409441 - Display apparatus for accessing desired web site
2. 7275987 - Virtual world system, server computer and information processor