Average Co-Inventor Count = 1.14
ph-index = 7
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 (10 from 228 patents)
2. Illinois Railway Equipment Company (4 from 13 patents)
3. Pullman Transport Leasing Company (3 from 3 patents)
4. Other (2 from 832,812 patents)
5. Richmond Tank Car Company (1 from 3 patents)
6. Apex Railway Products Co. (1 from 1 patent)
21 patents:
1. 4373841 - Quick release load securing device
2. 4362111 - Covered hopper car
3. 4329106 - Hopper car discharge gate operating mechanism
4. 4275662 - Railway hopper car roof support structure
5. 4252066 - Levered hopper door lock mechanism
6. 4184432 - Hopper car door lock mechanism
7. 4183370 - Pressure relief valve
8. T983010 - Venting structure for railway car
9. 4135608 - Adjustable support for bottom brake connecting rods for railway cars
10. 4119112 - Pressure relief valve
11. 4099468 - Lock for a hopper car outlet gate
12. 4077329 - Opening and closing means for hinged trough covers on hopper cars
13. 4073239 - Closing means for a hatch cover
14. 4063764 - Foot operated latch for hopper cars
15. 4062460 - Gate operating mechanism for a hopper car