Average Co-Inventor Count = 4.60
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. Hitachi Electronic Service Co. Ltd. (3 from 3 patents)
2. Hitachi Electronic Services, Co., Ltd. (1 from 2 patents)
4 patents:
1. 6983157 - Automatic report control system for reporting arrival at destination or passing point
2. 6769610 - Credit card double authentication system
3. 6726109 - Passport with anti-counterfeit ID chip
4. 5912058 - Shock absorber and package with shock absorbers