Average Co-Inventor Count = 4.18
ph-index = 6
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. (9 from 42,508 patents)
2. Xanavi Informatics Corporation (5 from 146 patents)
3. Hitachi Astemo Ltd. (1 from 1,220 patents)
4. Hitachi Software Engineering Company, Ltd. (1 from 228 patents)
14 patents:
1. 12391237 - Vehicle supervision device
2. 10241519 - Auto valet parking system and method
3. 9170805 - Software maintenance supporting device for analyzing relationships between variables
4. 8713580 - Information processing device and display control method
5. 8584086 - Software reuse support method and apparatus
6. 8179287 - Method and apparatus for communicating map and route guidance information for vehicle navigation
7. 7668817 - Method and system for data processing with spatial search
8. 7610144 - Navigation apparatus and processing method of the same
9. 7590486 - Automobile navigation apparatus
10. 7493215 - Navigation system and output controlling method therefor
11. 7428460 - Method of delivering difference map data
12. 7342516 - Method and apparatus for communicating map and route guidance information for vehicle navigation
13. 7069519 - Method, apparatus and navigation apparatus for sharing display by plural operating systems
14. 6324467 - Information providing system