Average Co-Inventor Count = 3.00
ph-index = 3
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. Staedtler Mars Gmbh & Co. Kg (2 from 26 patents)
2. J.s. Staedtler Gmbh & Co. Kg (1 from 34 patents)
3 patents:
1. D781958 - Cap
2. D765782 - Pencil with cap and stylus
3. D733220 - Pencil with stylus