Average Co-Inventor Count = 3.86
ph-index = 4
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. Hitachi Chemical Company, Ltd. (4 from 1,641 patents)
4 patents:
1. 5066560 - Process for producing toner for electrophotography
2. 4983488 - Process for producing toner for electrophotography
3. 4910114 - Toner for electrophotography
4. 4351910 - Expandable styrene series resin composition and process for production