Average Co-Inventor Count = 1.00
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. Firma J. S. Staedtler (1 from 4 patents)
1 patent:
1. 4634306 - Writing point for writing or recording instruments and process for its