Average Co-Inventor Count = 4.00
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. Alza Corporation (3 from 1,062 patents)
3 patents:
1. 5914131 - Hydromorphone therapy
2. 5702725 - Hydromorphone therapy
3. 5529787 - Hydromorphone therapy