Average Co-Inventor Count = 2.40
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 Company, Limited (2 from 383 patents)
2 patents:
1. 9994066 - Erasing implement and writing implement provided with erasing implement
2. 6382862 - Application liquid reservoir