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. Marvin Glass & Associates (1 from 422 patents)
2. Milton Bradley International, Inc. (1 from 18 patents)
2 patents:
1. D275409 - Ball game housing
2. D272919 - Electronic game board