Average Co-Inventor Count = 1.71
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. Kabushiki Kaisha Ohara (2 from 103 patents)
2 patents:
1. 5332700 - High dispersion optical glass
2. 5320985 - Low refractive optical glass of a flint glass type