Average Co-Inventor Count = 4.50
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. Canon Kabushiki Kaisha (3 from 90,673 patents)
3 patents:
1. 7455227 - System for card-based service access
2. 7159763 - Card reading device for service access
3. 7156302 - Card reading device for service access