Average Co-Inventor Count = 3.26
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. Voestalpine Nortrak Inc. (3 from 6 patents)
2. Voestalpine Railway Systems Nortrak LLC (3 from 3 patents)
3. Vae Nortrak North America Inc. (1 from 11 patents)
4. Voestalpine Vae Gmbh (1 from 10 patents)
7 patents:
1. 12359377 - Switch point roller assembly
2. 11168446 - Rail fastening apparatus
3. D910487 - Railroad tie
4. 10400397 - Boltless rail brace
5. 9352762 - Dual independent control hydraulic switch machine
6. 9290192 - Spring wing controller
7. 7677466 - Insulated rail joint assembly