Average Co-Inventor Count = 3.00
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. Sumitomo Chemical Company, Limited (2 from 6,893 patents)
2. Read Co., Ltd. (1 from 2 patents)
3 patents:
1. 6676853 - Phosphor for vacuum ultraviolet excitation material
2. 6527978 - Phosphor for vacuum ultraviolet ray-exciting light-emitting element
3. 5961884 - Blue or bluish green aluminum silicate luminous storage material and its