Average Co-Inventor Count = 2.22
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. Learning Resources, Inc. (5 from 23 patents)
5 patents:
1. 8526273 - Time interval indicating device
2. 8072846 - Time interval indicating device
3. 7729206 - Time interval indicating device
4. 7351062 - Educational devices, systems and methods using optical character recognition
5. D531669 - Educational device