Average Co-Inventor Count = 2.25
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. Hasbro, Inc. (3 from 496 patents)
3 patents:
1. 8920209 - Spinning toy apparatus
2. 6991509 - Activity toy
3. D495756 - Musical toy