Average Co-Inventor Count = 2.77
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)
2. Pragmatic Designs, Inc. (1 from 9 patents)
3 patents:
1. 6142849 - Musical toy
2. 6079985 - Programmable sound and music making device
3. 5668333 - Musical rainbow toy