Average Co-Inventor Count = 2.00
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 Company, Limited (2 from 383 patents)
2 patents:
1. D998708 - Writing instrument
2. D994771 - Writing instrument