Average Co-Inventor Count = 16.00
ph-index = 1
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 (1 from 832,891 patents)
2. Wisconsin Alumni Research Foundation (1 from 4,126 patents)
3. Technologies Humanware Canada Inc. (1 from 3 patents)
4. United States Library of Congress (1 from 2 patents)
2 patents:
1. 8049991 - Digital audio book cartridge and player with manipulation-facilitating features
2. D579940 - Cartridge