Average Co-Inventor Count = 6.86
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 Telecom Technologies, Ltd (4 from 58 patents)
4 patents:
1. D421423 - Card reading-writing device with modem
2. 5666409 - Dealing board
3. 5661793 - Key unit
4. 5418850 - Dealing board