Average Co-Inventor Count = 2.40
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. Amsted Industries Inc. (2 from 317 patents)
2 patents:
1. 4825775 - Railcar truck bolster with preassembled friction shoes
2. 4753174 - Railway vehicle bolster with integral and brake system car reservoir