Average Co-Inventor Count = 4.44
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. Sumitomo Chemical Company, Limited (1 from 6,896 patents)
2. Sumitomo Pharmaceuticals Company Limited (1 from 174 patents)
2 patents:
1. 5498447 - Coating method
2. 5002775 - Tablets having clear impressed marks and method for making same