Average Co-Inventor Count = 3.43
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. The Burlington Northern and Santa Fe Railway Company (2 from 6 patents)
2 patents:
1. 6651353 - Rail alignment tool
2. 6385861 - Rail alignment tool