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. Trinity Industries, Inc. (1 from 97 patents)
2. Greenville Steel Car Co. (1 from 5 patents)
2 patents:
1. 5584252 - Railway freight car
2. 4212252 - Gondola-type railway car