Average Co-Inventor Count = 4.00
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. Sony Corporation (2 from 58,130 patents)
2 patents:
1. 5306172 - Video tape recorder having built-in camera detachable hand grip member
2. 5157512 - Video tape recorder having built-in camera detachable hand grip member