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. Sharp Kabushiki Kaisha Corporation (2 from 25,537 patents)
2 patents:
1. 5642183 - Spatial filter used in a reduction-type projection printing apparatus
2. 5396311 - Filter for projection photolithographic system