Average Co-Inventor Count = 3.75
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. Louis Marx & Co., Inc. (2 from 28 patents)
2 patents:
1. 4023804 - Spherical projectile game
2. 4006899 - Device simulating play action game