Average Co-Inventor Count = 5.46
ph-index = 4
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. Sankyo Company, Limited (4 from 613 patents)
4 patents:
1. 5212068 - Human pancreatic elastase
2. 5162205 - Human pancreatic elastase I
3. 4985361 - Human pancreatic elastase
4. 4968614 - Human pancreatic elastase I