Average Co-Inventor Count = 4.00
ph-index = 4
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 (6 from 8,889 patents)
6 patents:
1. 10175584 - Optical element and exposure apparatus
2. 9046796 - Optical element and exposure apparatus
3. 8189170 - Optical element and exposure apparatus
4. 8149381 - Optical element and exposure apparatus
5. 7993008 - Optical element and exposure apparatus
6. 7697111 - Optical element and exposure apparatus