Average Co-Inventor Count = 1.07
ph-index = 10
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. Parker Drilling Company (4 from 9 patents)
2. Parco Mast and Substructures, Inc. (4 from 5 patents)
3. Parco Mast and Substructure, Inc. (2 from 2 patents)
4. Onsite Technology LLC (1 from 4 patents)
5. Parker Technology, Inc. (1 from 2 patents)
12 patents:
1. 5921336 - Walking substructure device
2. 5570749 - Drilling fluid remediation system
3. 4903443 - Derrick having upper and lower crown block positions
4. 4875530 - Automatic drilling system
5. 4836300 - Method of performing drilling operations from a derrick
6. 4796863 - Dual cluster crown block
7. 4757592 - Method of erecting a portable drilling rig
8. 4744710 - Drilling derrick with external pipe storage
9. 4676484 - Helicopter transportable traveling block
10. 4630425 - Erection means for portable drilling system
11. 4590720 - Telescoping derrick
12. 4473977 - Erection means for portable drilling system