Average Co-Inventor Count = 7.47
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. Meiji Seika Kaisha, Ltd. (2 from 382 patents)
2 patents:
1. 4225706 - Polychalcogen ester of cephem compound, process for preparing the same
2. 4159372 - Process for preparing cephalosporin esters in the presence of liquid