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. Dai Nippon Toryo Co., Ltd. (2 from 116 patents)
2 patents:
1. 4138529 - Phosphors and X-ray image converters using the same
2. 4109152 - X-Ray intensifying screens