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. Sharp Kabushiki Kaisha Corporation (2 from 25,530 patents)
2 patents:
1. 4824539 - Perpendicular magnetic recording medium
2. 4725482 - Perpendicular magnetic recording medium