Average Co-Inventor Count = 3.43
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. Hughes Tool Company LLC (2 from 301 patents)
2 patents:
1. 4600058 - Equipment insert and method
2. 4372390 - Well valve