Average Co-Inventor Count = 2.67
ph-index = 1
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. (1 from 42,488 patents)
2. Hitachi Communication Technologies, Ltd. (1 from 129 patents)
2 patents:
1. 8489717 - Accelerated cable modem restart service
2. 8391308 - DOCSIS PON