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. Schlumberger Technology Corporation (3 from 10,170 patents)
3 patents:
1. 6973974 - Valves for use in wells
2. 6966380 - Valves for use in wells
3. 6668935 - Valve for use in wells