Average Co-Inventor Count = 5.29
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. (3 from 42,494 patents)
3 patents:
1. D290263 - Industrial robot
2. D289406 - Industrial robot
3. D288935 - Industrial robot