Average Co-Inventor Count = 2.40
ph-index = 1
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. Progress Rail Services Corporation (2 from 119 patents)
2 patents:
1. 9988768 - System, method, and apparatus to restrict movement of railway guard bar
2. 9932054 - Double point derail switch