Average Co-Inventor Count = 5.00
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. Zenyaku Kogyo Kabushiki Kaisha (2 from 41 patents)
2 patents:
1. 4528188 - Polysaccharide PS-A obtained from barrenwort deriving from plants
2. 4501736 - Extract from barrenwort