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, Ltd. (3 from 42,508 patents)
3 patents:
1. 7450815 - Image recording and reproducing apparatus
2. 6763174 - Image recording and reproducing apparatus
3. 6292618 - Image recording and reproducing apparatus