Average Co-Inventor Count = 3.20
ph-index = 4
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 (4 from 222 patents)
4 patents:
1. 5827070 - System and methods for computer based testing
2. 5657256 - Method and apparatus for administration of computerized adaptive tests
3. 5565316 - System and method for computer based testing
4. 5059127 - Computerized mastery testing system, a computer administered variable