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. Pearson Education, Inc. (4 from 289 patents)
2. Globalenglish Corporation (1 from 15 patents)
5 patents:
1. 11960825 - Network-accessible collaborative annotation tool
2. 11281866 - Web-based tool for collaborative, social learning
3. 10503835 - Web-based tool for collaborative, social learning
4. 10223342 - Network-accessible collaborative annotation tool
5. 8612469 - Network-accessible collaborative annotation tool