Average Co-Inventor Count = 3.75
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. Tokuyama Corporation (1 from 504 patents)
2. Tokuyama Soda Kabushiki Kaisha (1 from 95 patents)
2 patents:
1. 5430146 - Spirooxazine compounds
2. 5246989 - Photochromic compound, composition and use thereof