Average Co-Inventor Count = 3.24
ph-index = 3
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. (4 from 1,306 patents)
2. Ishihara Sangyo Kaisha, Ltd. (2 from 393 patents)
4 patents:
1. 4777509 - System for loading sheet materials on a rotary drum
2. 4702588 - Apparatus for producing an electrophotographic print
3. 4682881 - Apparatus for producing an electrophotographic print
4. 4668073 - Fixing apparatus