Average Co-Inventor Count = 1.50
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. Pullman Incorporated (2 from 228 patents)
2 patents:
1. 4224877 - Railway hopper car closure actuating mechanism
2. 4134344 - Railway hopper car door lock