Average Co-Inventor Count = 2.48
ph-index = 5
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. (7 from 42,517 patents)
7 patents:
1. 7590597 - Electronic business transaction system
2. 7428511 - Electronic business transaction system
3. 6446050 - Method of and system for processing electronic document and recording medium for recording processing program
4. 6049787 - Electronic business transaction system with notarization database and
5. 5903762 - Application execution method and system therefor
6. 5311429 - Maintenance support method and apparatus for natural language processing
7. 4958285 - Natural language processing system