Average Co-Inventor Count = 2.40
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. Meridian Rail Information Systems Corp. (2 from 5 patents)
2. Abc Rail Corporation (1 from 10 patents)
3 patents:
1. 6568641 - Electrically operated railroad switch machine
2. 6427950 - Electrically operated railroad switch machine
3. 4938438 - Railroad switch stand