Average Co-Inventor Count = 6.00
ph-index = 4
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 42,488 patents)
4 patents:
1. 6745183 - Document retrieval assisting method and system for the same and document retrieval service using the same
2. 6654738 - Computer program embodied on a computer-readable medium for a document retrieval service that retrieves documents with a retrieval service agent computer
3. 6457004 - Document retrieval assisting method, system and service using closely displayed areas for titles and topics
4. 6446065 - Document retrieval assisting method and system for the same and document retrieval service using the same