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. C. Josef Lamy Gmbh (2 from 12 patents)
2 patents:
1. 5161906 - Writing instrument
2. 5152626 - Writing pen with retractable clip