Average Co-Inventor Count = 3.31
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. Frank's Casing Crew and Rental Tools, Inc. (3 from 74 patents)
2. Express Energy Services Operating LP (2 from 3 patents)
3. Frank's International, Inc. (129 patents)
5 patents:
1. 8051909 - Method and apparatus for positioning the proximal end of a tubular string above a spider
2. 7987915 - Circulating sub with mudsaver for dispensing and circulating fluid in a well bore
3. 7938177 - Circulating sub tool for dispensing and circulating fluid in a well bore
4. 7322406 - Elevation sensor for a service hose and an apparatus for positioning and stabbing well tubulars
5. 7182133 - Elevator sensor