Average Co-Inventor Count = 4.80
ph-index = 1
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 High-Tech Corporation (2 from 1,146 patents)
2 patents:
1. D958215 - Electron microscope
2. 11387072 - Charged particle beam device