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. Dainippon Screen Seizo Kabushiki-kaisha (1 from 130 patents)
1 patent:
1. 4448518 - Photosensitive material holder for an upright printing machine