Average Co-Inventor Count = 4.00
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. Dainippon Screen Seizo Kabushiki-kaisha (1 from 130 patents)
1 patent:
1. 4335407 - Sharpness emphasizing method and machine used in a picture reproducing