Average Co-Inventor Count = 5.00
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 Telecom Technologies, Ltd (5 from 58 patents)
5 patents:
1. 5666409 - Dealing board
2. 5661793 - Key unit
3. 5461376 - Panel unit of dealing board
4. 5461377 - Panel unit of dealing board
5. 5418850 - Dealing board