Average Co-Inventor Count = 1.50
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. Other (4 from 832,880 patents)
4 patents:
1. 6764311 - System and method for training/managing basic ability
2. 6522863 - Multiple listening training device and a multiple listening training recording medium
3. 5595956 - Thermal transfer printing dye sheet
4. 5565406 - Thermal transfer printing dye sheet