Average Co-Inventor Count = 4.00
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. Nippon Telegraph and Telephone Corporation (1 from 5,290 patents)
1 patent:
1. 5414746 - X-ray exposure mask and fabrication method thereof