Average Co-Inventor Count = 4.00
ph-index = 1
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. Mitsubishi Pencil Kabushiki Kaisha (2 from 196 patents)
2 patents:
1. 5498281 - Recording material containing carbonaceous powder whose surface is
2. 5437715 - Recording material containing carbonaceous powder whose surface is