Average Co-Inventor Count = 9.00
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. Nikon Corporation (1 from 8,898 patents)
1 patent:
1. 8908151 - Illumination optical system, exposure apparatus, device manufacturing method, compensation filter, and exposure optical system