Average Co-Inventor Count = 1.71
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. Ksa Limited Partnership (3 from 3 patents)
2. Koppers Company, Inc. (2 from 297 patents)
3. U.S. Plastic and Chemical Corp. (1 from 1 patent)
6 patents:
1. 6786459 - Concrete railroad tie turnout assembly
2. 6572027 - Concrete railroad tie two-piece insulator spacer and fastening system
3. 6343748 - Concrete railroad tie insulator spacer and fastening system
4. 4530434 - Method and apparatus for the inspection and separation of symmetrical
5. 4326421 - Continuous proofloader
6. 4196811 - Method and apparatus for the inspection of buttons