Average Co-Inventor Count = 3.00
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 42,517 patents)
2. Hitachi Computer Consultant Ltd. (2 from 3 patents)
2 patents:
1. 5177680 - Electronic mail system with means to transmit data to a plurality of
2. 5109487 - System and method for distributed data processing utilizing distributed