Average Co-Inventor Count = 3.09
ph-index = 3
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. Bethlehem Steel Corporation (1 from 370 patents)
3. Jac Patent Company (1 from 10 patents)
4. Freightcar America, Inc. (1 from 4 patents)
5 patents:
1. 7832340 - Hopper railcar with automatic individual door system
2. 6679187 - Slab and coil railcar
3. 6227123 - Railroad car pick-up shoe
4. 6148735 - Light weight gondola car
5. 4361097 - Railway gondola cars