Average Co-Inventor Count = 5.89
ph-index = 13
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. (21 from 42,485 patents)
2. Hitchi, Ltd. (1 from 9 patents)
3. Hitachi Engineering Ltd (1 from 7 patents)
22 patents:
1. 6339638 - Telephone used for electronic money card transaction and method of operation of the same
2. 6285391 - Picture codec and teleconference terminal equipment
3. 6249309 - Picture codec and teleconference terminal equipment
4. 6189783 - System for aiding in use of a facility arranged to equip visitors with portable information storing units, method for aiding in use of a facility, and recording medium for recording the method
5. 6083267 - System and method for designing accessory
6. D423037 - Electronic value processing device
7. 6042002 - Holding apparatus for a plurality of IC cards facilitating transactions
8. 6016957 - IC card reader/writer and method of operation thereof
9. 6000607 - IC card reader/writer and method of operation thereof
10. 5966164 - Television telephone
11. 5952639 - Depositing, withdrawal, balance check, exchange and transfer of
12. 5936220 - Electronic wallet and method of operation of the same
13. D411524 - IC card reader and writer
14. D409229 - Electronic wallet
15. D408438 - Electronic wallet