Average Co-Inventor Count = 2.05
ph-index = 4
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. Gunderson, Inc. (4 from 84 patents)
4 patents:
1. 9174656 - Insulative railway boxcar
2. 7896140 - Handbrake linkage for a railroad freight car
3. 6523484 - Center beam car with depressed cargo-carrying area
4. 6431085 - Center beam car with depressed cargo-carrying area