Average Co-Inventor Count = 7.00
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-Technologies Corporation (2 from 2,874 patents)
2 patents:
1. 7601974 - Charged particle beam apparatus
2. 7205541 - Charged particle beam apparatus