Average Co-Inventor Count = 6.00
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. (4 from 42,517 patents)
4 patents:
1. 7516080 - Freight information management method and freight management system using electronic tags
2. 6941278 - Freight information management method and freight management system using electronic tags
3. 6560579 - Freight information management method and freight management system using electronic tags
4. 6304856 - Freight information management method and freight management system using electronic tags