Average Co-Inventor Count = 6.13
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. (4 from 42,488 patents)
4 patents:
1. 5682466 - Information processing apparatus for obtaining output data from plural
2. 5638492 - Information processing apparatus and monitoring apparatus
3. 4556899 - Insulated type semiconductor devices
4. 4542398 - Semiconductor devices of multi-emitter type