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. D436947 - Pickup for an optical disc player or recorder
2. D433676 - Drive unit for an optical disc player or recorder