Average Co-Inventor Count = 2.00
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. Other (2 from 832,761 patents)
2 patents:
1. 8109820 - Methods and apparatus for chess instruction
2. 5678001 - Computerized game teaching method