Average Co-Inventor Count = 2.77
ph-index = 3
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. Sumitomo Metal Industries, Inc. (3 from 929 patents)
3 patents:
1. 5645644 - Plasma processing apparatus
2. 4902934 - Plasma apparatus
3. 4671907 - Method of manufacturing carbon materials