Average Co-Inventor Count = 1.83
ph-index = 6
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. Thrall Car Manufacturing Company (4 from 64 patents)
2. United-american Car Co. (2 from 2 patents)
3. Other (1 from 832,718 patents)
7 patents:
1. 4888920 - Gutter anti-clogging device
2. 4813359 - Single axle railroad truck with frame improvements
3. 4759669 - Vehicle transporting railroad car with hinged deck section lock
4. 4677918 - Railroad car with retractable closure track held down by bridge plate
5. 4594948 - Liquid and solid dual lading railroad car
6. 4417526 - Gondola car construction
7. 4377058 - Curved hopper car roof