Average Co-Inventor Count = 2.67
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. Other (1 from 832,961 patents)
2. Faber-Castell Ag (1 from 45 patents)
2 patents:
1. 7909525 - Article, in particular a writing implement, having a gripping zone with raised structures
2. 4532276 - Writing fluid