Average Co-Inventor Count = 1.43
ph-index = 5
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. Other (2 from 832,718 patents)
2. Nabors Industries, Inc. (2 from 28 patents)
3. Canrig Drilling Technology Ltd. (1 from 72 patents)
5 patents:
1. 6082225 - Power tong wrench
2. 6024181 - Portable top drive
3. 5785132 - Backup tool and method for preventing rotation of a drill string
4. 5755296 - Portable top drive
5. 5251709 - Drilling rig