Average Co-Inventor Count = 3.00
ph-index = 1
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. U.S. Philips Corporation (2 from 14,087 patents)
2 patents:
1. 5216664 - Optically readable disc with a centering member fixed to a transparent
2. 4899329 - Optically readable disc with a centering member fixed to a transparent