Average Co-Inventor Count = 1.33
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. Pentel Kabushiki Kaisha (2 from 264 patents)
2 patents:
1. D724670 - Mechanical pencil
2. D724669 - Mechanical pencil