Average Co-Inventor Count = 3.35
ph-index = 10
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. (15 from 42,485 patents)
15 patents:
1. 6454164 - Pocket-size information transfer apparatus having dual IC card insertion slots and IC card using the same
2. 6189786 - Portable terminal device with stackable IC card slot opening
3. D423471 - IC card reader and writer
4. D423037 - Electronic value processing device
5. 6019623 - Terminal device for an IC card
6. 6016954 - Card holder-type balance reader
7. 6010066 - Portable terminal device with stackable IC cards slot opening
8. 5949047 - Dust-proof portable IC card reader
9. 5945652 - Electronic wallet and method for operating the same
10. 5929427 - Portable card reader/writer
11. D409229 - Electronic wallet
12. D408438 - Electronic wallet
13. 5895903 - Terminal for portable IC card
14. D393277 - Electronic value processing device
15. 5686714 - Dust-proof portable IC card reader