Average Co-Inventor Count = 4.44
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. Portec Rail Products, Inc. (2 from 29 patents)
2. Koppers Delaware, Inc. (2 from 17 patents)
3. Other (1 from 832,891 patents)
4. Protec Rail Products, Inc. (1 from 1 patent)
6 patents:
1. 11041274 - Center supported bond joint
2. 8302878 - Method and arrangement to insulate rail ends
3. 7975933 - Method and arrangement to insulate rail ends
4. D576023 - Center supported bond joint
5. D547642 - Wrap-around joint bar sleeve insulator
6. 7097112 - Profiled bar