Average Co-Inventor Count = 3.90
ph-index = 3
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. Educational Testing Service (5 from 222 patents)
5 patents:
1. 10380333 - Multi-factor authentication for determining whether a user is authorized to take an examination
2. 9720890 - System and method for rendering an assessment item
3. 9721080 - Systems and methods for multi-factor authentication for administration of a computer-based test
4. 9449525 - Systems and methods for testing over a distributed network
5. 8909127 - Computer-implemented systems and methods for carrying out non-centralized assessments