Average Co-Inventor Count = 4.68
ph-index = 30
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. (48 from 42,517 patents)
2. Hitachi Maxell, Limited (1 from 1,112 patents)
3. Nichiban Company Limited (1 from 41 patents)
49 patents:
1. 7761347 - Method and system for identifying and managing radio frequency identification (RF-ID) attached objects
2. 6912516 - Place name expressing dictionary generating method and its apparatus
3. 6477239 - Sign language telephone device
4. 6470091 - Address reader, sorting machine such as a mail thing and character string recognition method
5. 6291785 - Address reader, sorting machine such as a mail thing and character string recognition method
6. 6262330 - Pressure sensitive adhesive tape for skin and base material therefor
7. 6246794 - Method of reading characters and method of reading postal addresses
8. 6181778 - Chronological telephone system
9. 6182062 - Knowledge based information retrieval system
10. 6094647 - Presearch type document search method and apparatus
11. 5757983 - Document retrieval method and system
12. 5696916 - Information storage and retrieval system and display method therefor
13. 5628003 - Document storage and retrieval system for storing and retrieving
14. 5576849 - Image data transformation apparatus and image entry apparatus
15. 5574881 - High capacity data storage method and system using independently