Average Co-Inventor Count = 2.00
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. Johnstown America Corporation (2 from 15 patents)
2 patents:
1. 5458067 - Two piece center sill shroud for railway cars
2. 5367958 - Two piece center sill shroud for railway cars