Average Co-Inventor Count = 5.22
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. Ricoh Company, Ltd. (4 from 28,544 patents)
4 patents:
1. 4871635 - Electrophotographic photoconductor layered element comprising salt
2. 4775605 - Layered photosensitive material for electrophotography
3. 4469771 - Electrophotographic light-sensitive member with thin overlayer
4. 4225648 - Electrophotographic light-sensitive member