Average Co-Inventor Count = 6.12
ph-index = 7
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. (7 from 42,488 patents)
7 patents:
1. 5966164 - Television telephone
2. 5677727 - Television telephone
3. 5396269 - Television telephone
4. D306578 - Optical disk drive unit for electronic computer
5. D296696 - Central processor unit
6. D295414 - Computer display
7. D293675 - Central processor unit