Average Co-Inventor Count = 1.29
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 (3 from 82 patents)
2. Wernicke & Co. Gmbh (1 from 40 patents)
3 patents:
1. D451119 - Reading glasses
2. D446237 - Reading glasses
3. 6110029 - Template for the lens of a pair of glasses