Average Co-Inventor Count = 3.00
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. Trn Business Trust (4 from 81 patents)
4 patents:
1. 6321661 - Railway freight car metal floor
2. 6318275 - Railway freight car metal floor
3. 6112671 - Railway freight car metal floor
4. 5918549 - Railway freight car metal floor