Average Co-Inventor Count = 5.00
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. Nippon Kokan Kabushiki Kaisha (1 from 487 patents)
2. Nippon Kokan Kaubshiki Kaisha (1 from 1 patent)
2 patents:
1. 4987113 - Preparation of coal liquefaction catalyst
2. 4820405 - Method of liquefying coal