Average Co-Inventor Count = 3.00
ph-index = 2
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-Technologies Corporation (2 from 2,874 patents)
2 patents:
1. 8344320 - Electron microscope with electron spectrometer
2. 7888641 - Electron microscope with electron spectrometer