Average Co-Inventor Count = 1.50
ph-index = 2
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. (2 from 42,494 patents)
2 patents:
1. 6754658 - Database server processing system, method, program and program storage device
2. 5781743 - System and method for distributed data processing using different server