Average Co-Inventor Count = 2.00
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. Hydril USA Manufacturing LLC (2 from 67 patents)
2. Hydril Company (1 from 277 patents)
3 patents:
1. 7950668 - Remote operated actuator system for drill string internal blowout preventer
2. 7665739 - Pressure-actuated seals for rotating members
3. 7137453 - Remote operated actuator system for drill string internal blowout preventer