Average Co-Inventor Count = 3.00
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. Dainippon Screen Mfg. Co., Ltd. (2 from 1,306 patents)
2 patents:
1. 4996560 - Apparatus for exposing an image of an original film on a photosensitive
2. 4687313 - Apparatus for processing sensitive materials