Average Co-Inventor Count = 3.66
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. Koppers Delaware, Inc. (3 from 17 patents)
2. Portec, Inc. (2 from 46 patents)
5 patents:
1. 12037750 - Gauge plate insulator
2. 10961665 - Rail joint assembly having forged rail joint bars
3. D885977 - Anti-rail rollover device
4. 5394958 - Rail lubrication apparatus
5. 5348120 - Rail lubrication apparatus