Average Co-Inventor Count = 2.07
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, Ltd. (3 from 42,496 patents)
3 patents:
1. 5382777 - Automated teller machine
2. 4725830 - Data input apparatus
3. 4423318 - Transaction processing system