Average Co-Inventor Count = 2.67
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. Ishigaki Company Limited (2 from 29 patents)
2 patents:
1. 10252192 - Filter medium, filtering device using filter medium, and filter medium manufacturing method
2. 9718004 - Filter medium layer and filter device provided with same