Average Co-Inventor Count = 4.29
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. Norsk Hydro, A.s. (1 from 240 patents)
2. Norskhydro Asa (1 from 172 patents)
3. Altinex As (1 from 2 patents)
3 patents:
1. 5997045 - Pipe joint
2. 5881807 - Injector for injecting a tracer into an oil or gas reservior
3. 5322120 - Electro hydraulic deep well sampling assembly