Average Co-Inventor Count = 8.12
ph-index = 3
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. Pfizer Corporation (4 from 4,455 patents)
4 patents:
1. 8097621 - Pyrazolo[4,3-d]pyrimidines as phosphodiesterase inhibitors
2. 7572799 - Pyrazolo[4,3-d]pyrimidines as Phosphodiesterase Inhibitors
3. 7569572 - Pyrazolo[4,3-D]pyrimidines
4. 7262192 - Substituted pyrazolo[4,3-d]pyrimidines and their use as PDE-5 inhibitors