Average Co-Inventor Count = 2.78
ph-index = 4
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. (5 from 42,485 patents)
5 patents:
1. D450057 - Computer generated icon for a display screen
2. D441761 - Computer generated icon for a display screen
3. D417202 - Magnetic disc storage unit for electronic computer
4. D413626 - Automatic postal code reading and sorting machine,
5. D411184 - Magnetic disc storage unit for electronic computer