Average Co-Inventor Count = 3.00
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. Dart Industries Inc. (2 from 1,642 patents)
2 patents:
1. D346823 - Combined holder and display device for learning cards
2. 5277587 - Learning toy