Average Co-Inventor Count = 2.00
ph-index = 4
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. Stilform Gmbh (4 from 4 patents)
4 patents:
1. D981487 - Pen
2. D884788 - Pen
3. D829820 - Fountain pen
4. D823944 - Pen