Average Co-Inventor Count = 2.67
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. Sperry Rail, Inc. (2 from 7 patents)
2 patents:
1. 6600999 - Hi-rail vehicle-based rail inspection system
2. 6476603 - Brush assembly for magnetic induction test apparatus