Average Co-Inventor Count = 2.67
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. Mitsui Coke Co. Ltd. (2 from 13 patents)
2 patents:
1. 4243488 - Coke compositions and process for manufacturing same
2. 4111786 - Process for liquefying coal