Average Co-Inventor Count = 3.53
ph-index = 3
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. Hitachi, Ltd. (3 from 42,488 patents)
3 patents:
1. 6983268 - Log analyzing method, execution apparatus for the same, and recording medium for recording process program thereof
2. 6832227 - Database management program, a database managing method and an apparatus therefor
3. 5400668 - Superconducting magnet magnetically levitated transportation apparatus