Average Co-Inventor Count = 5.00
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. Nippon Chemiphar Co., Ltd. (2 from 132 patents)
2 patents:
1. 4596803 - Piperazine derivatives and a medicine containing the same
2. 4507297 - Piperazine derivatives and a medicine containing the same