Average Co-Inventor Count = 1.50
ph-index = 5
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. Acf Industries, Incorporated (4 from 400 patents)
2. Other (1 from 832,812 patents)
5 patents:
1. 4677917 - High volume covered hopper car with loading from below and automatic
2. 4422532 - Hand brake mechanism including force dividing assembly
3. 4315465 - Constant contact side bearing for articulated rail cars
4. 4091742 - Stacked container well hole gondola car
5. 3995564 - Low level flat car