Average Co-Inventor Count = 3.41
ph-index = 9
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, Ltd. (12 from 42,485 patents)
2. Hitachi Keiyo Engineering Co., Ltd. (1 from 34 patents)
12 patents:
1. 6679423 - Electronic-money rewarding system for lost and found IC card
2. 6321213 - Electronic money processing method having a transaction fee collecting function and an electronic money storage apparatus for the same
3. 6273334 - Electronic-money rewarding system for lost and found IC card
4. 6230971 - Transaction-oriented electronic accommodation system
5. 6116506 - Transaction-oriented electronic accommodation system
6. 6039250 - Electronic money sending system
7. 5932859 - Electronic-money rewarding system for lost and found IC card
8. 5754654 - Electronic ticket vending system and method thereof
9. 5751957 - Communication service system employing translation rules for
10. 5481664 - Method of controlling information in multimedia system
11. 5276617 - Transaction processing system and method
12. 5214269 - Method for performing transaction