Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9303364 | Rail cant measurement tool and method | Robert N. Madderom, Harold Thomas Ruggles, Brandon R. Huynh | 2016-04-05 |
| 8844149 | Rail cant measurement tool and method | Robert N. Madderom, Harold Thomas Ruggles, Brandon R. Huynh | 2014-09-30 |
| 5791033 | Railroad car truck spring jack | Robert V. Norby, Henry F. Ninstil | 1998-08-11 |
| 5756903 | Track strength testing vehicle with a loaded gage axle and loaded gage axle apparatus | Robert V. Norby | 1998-05-26 |