Average Co-Inventor Count = 2.86
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. Other (1 from 832,718 patents)
2. Holland LP (1 from 47 patents)
2 patents:
1. 7520415 - Method of repairing a rail
2. 6515249 - Method of railroad rail repair