Average Co-Inventor Count = 6.15
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. Hitachi Zosen Corporation (2 from 278 patents)
2 patents:
1. 5635142 - NO.sub.x adsorption and removal apparatus
2. 5435981 - Method of adsorbing and removing nitrogen oxides