Average Co-Inventor Count = 5.14
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 42,508 patents)
3 patents:
1. 6823258 - Method and apparatus for gathering vehicle information
2. 6711495 - Method and apparatus for gathering vehicle information
3. 6433704 - Communication device of moving body information and communication method thereof