Average Co-Inventor Count = 3.68
ph-index = 15
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. (36 from 42,508 patents)
2. Nippon Kokan Kabushiki Kaisha (1 from 487 patents)
36 patents:
1. 7200470 - Train detection system and a train detection method
2. 7027901 - Transmitter and receiver device for train detection
3. 6965376 - Video or information processing method and processing apparatus, and monitoring method and monitoring apparatus using the same
4. 6829526 - Train detection system and a train detection method cross reference to related application
5. 6604031 - Train detection system and a train detection method
6. 6470244 - Train detection system
7. 6374165 - Railway information transmission method and system
8. 6335722 - Video or information processing method and processing apparatus, and monitoring method and monitoring apparatus using the same
9. 6317664 - Train detection system and a train detection method
10. 6230086 - Railway information transmission method and system
11. 6230085 - Train detection system and a train detection method
12. 6211857 - Interaction support system and method
13. 6072503 - Video synchronization processing method and apparatus
14. 5777597 - Interaction support system and method
15. 5703791 - Electric power system stabilization control apparatus and method thereof