Average Co-Inventor Count = 3.00
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. Black Hawk Energy Services, Inc. (3 from 3 patents)
3 patents:
1. 9341028 - Counterweight assembly for a self-propelled derrick rig assembly
2. 9238945 - Base beam and self-propelled derrick rig assembly
3. 9212524 - Methods of supporting a self-propelled derrick rig