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. Faber-Castell Ag (3 from 45 patents)
3 patents:
1. 12152158 - Graphite lead or graphite chalk or graphite block, pencil with graphite lead, and method for producing a graphite lead or graphite chalk or graphite block
2. 8703231 - Lead for painting and method of painting with a lead
3. 6579530 - Cosmetic powder pencil or powder chalk