Average Co-Inventor Count = 4.00
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 42,508 patents)
2. Hitachi Communication Systems, Inc. (1 from 17 patents)
2 patents:
1. 5926456 - Path changing system and method for use in ATM communication apparatus
2. 5600630 - Path changing system and method for use in ATM communication apparatus