Average Co-Inventor Count = 5.46
ph-index = 1
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. Tosoh Corporation (2 from 893 patents)
2 patents:
1. 5028967 - Achromatic lens for ultraviolet rays
2. 4870146 - Process for producing a light color high softening point hydrocarbon