Average Co-Inventor Count = 5.60
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. Ebara Corporation (3 from 2,508 patents)
3 patents:
1. D1021832 - Elastic membrane
2. D989012 - Elastic membrane
3. 11472001 - Elastic membrane and substrate holding apparatus