Average Co-Inventor Count = 1.36
ph-index = 2
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. The Parker Pen Company (3 from 29 patents)
3 patents:
1. D243014 - Fountain pen
2. 3957379 - Fountain pen
3. 3951555 - Modular writing pen