Average Co-Inventor Count = 3.43
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. Essilor International Cie Generale D'optique (2 from 87 patents)
2 patents:
1. 4640055 - Grinding machine for guided or non-guided beveling or grooving of an
2. 4612732 - Machine for grinding ophthalmic lenses