Average Co-Inventor Count = 8.00
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. Other (1 from 832,966 patents)
2. Ricoh Company, Ltd. (1 from 28,595 patents)
3. Takemoto Yushi Kabushiki Kaisha (1 from 125 patents)
2 patents:
1. 6977129 - Charge control agent, toner using same developer containing the toner and developing device containing the developer
2. 6830859 - Charge control agent and toner using same