Average Co-Inventor Count = 1.68
ph-index = 8
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 (6 from 832,680 patents)
2. Blackhawk Specialty Tools, LLC (6 from 15 patents)
3. Arrowhead Continental (1 from 2 patents)
4. Emco Arrowhead (1 from 1 patent)
14 patents:
1. 9683437 - Method of signaling passage of objects using tattle-tale apparatus
2. 9605505 - Method and apparatus for performing cementing operations
3. 9500060 - Method and apparatus for performing cementing operations on top drive rigs
4. 9212531 - Method and apparatus for performing cementing operations
5. 8887799 - Tattle-tale apparatus
6. 8636067 - Method and apparatus for performing cementing operations on top drive rigs
7. 7066106 - Reverberating mechanical siren
8. 6634423 - Lifting top drive remote control cement head
9. 6164274 - Apparatus and method for heating fluid
10. 5950724 - Lifting top drive cement head
11. 5931153 - Apparatus and method for generating heat
12. 4566672 - Pressure balanced ball valve
13. 4557509 - High pressure swivel coupling
14. 4407533 - High pressure swivel joint