Average Co-Inventor Count = 3.00
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 (4 from 58,129 patents)
4 patents:
1. 6368766 - Developing paper
2. 6309118 - Ink ribbon
3. 6255030 - Photographic paper
4. 5876270 - Method and apparatus for polishing surface of magnetic recording medium