Average Co-Inventor Count = 2.40
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. Hasbro Industries, Inc. (2 from 48 patents)
2 patents:
1. 4458444 - Track laying toy vehicle
2. 4364176 - Drawing appliance