Average Co-Inventor Count = 5.00
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. Hitachi Software Engineering Company, Ltd. (1 from 228 patents)
1 patent:
1. 6437314 - Coordinate input pen, and electronic board, coordinate input system and electronic board system using the coordinate input pen