Average Co-Inventor Count = 10.29
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. Optische Werke G. Rodenstock (2 from 80 patents)
2 patents:
1. 5880810 - Series for progressive spectacle lenses
2. 5854669 - Series of lenses