Average Co-Inventor Count = 6.43
ph-index = 3
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. (3 from 42,508 patents)
3 patents:
1. 5331543 - Business monitoring system and method
2. 5282273 - Enterprise information system having three level hierarchy of data bases
3. 5109508 - Data base system including memorandum information and method for