Average Co-Inventor Count = 2.25
ph-index = 1
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. J-data Co., Ltd. (3 from 4 patents)
3 patents:
1. 11361049 - History management method
2. 10678883 - History management method
3. 8346296 - Portable telephone