Average Co-Inventor Count = 3.11
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. Agency of Industrial Science and Technology Ministry of International (1 from 172 patents)
2. Japan Oxygen, Co., Ltd. (1 from 24 patents)
2 patents:
1. 4828594 - Process for the production of glass
2. 4194916 - Reversibly photosensitive glass