Average Co-Inventor Count = 1.67
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. Pullman Incorporated (5 from 228 patents)
5 patents:
1. 4252482 - Railway car counter-balanced tilting deck
2. 4238168 - Railway car for transporting vehicles
3. 4149472 - Railway car tilting deck lock
4. 4119042 - Railway car counterbalanced tilting deck
5. 4119043 - Railway car counterbalanced tilting deck