Average Co-Inventor Count = 2.67
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. Other (1 from 832,680 patents)
2. Xerox Corporation (1 from 24,189 patents)
2 patents:
1. 4298275 - Radially varying transmission filter for wide angle copying device
2. 4298274 - Variable density filter for a multi-magnification copying device