Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4888920 | Gutter anti-clogging device | — | 1989-12-26 |
| 4813359 | Single axle railroad truck with frame improvements | Kenneth Smith | 1989-03-21 |
| 4759669 | Vehicle transporting railroad car with hinged deck section lock | James C. Robertson | 1988-07-26 |
| 4677918 | Railroad car with retractable closure track held down by bridge plate | William R. Baker, James C. Robertson | 1987-07-07 |
| 4594948 | Liquid and solid dual lading railroad car | Kenneth Smith | 1986-06-17 |
| 4417526 | Gondola car construction | Kent Johnson | 1983-11-29 |
| 4377058 | Curved hopper car roof | Keith J. Hallam | 1983-03-22 |
| 4279203 | Passenger car compartment upper sleeping berth support assembly | — | 1981-07-21 |
| 4266487 | Railway passenger car window framing construction | Jack E. Gutrigde | 1981-05-12 |
| 4241552 | Partition wall joint | — | 1980-12-30 |
| 4227465 | Upper berth support arrangement | Jack E. Gutridge | 1980-10-14 |
| 4198785 | Movable threshold door seal | Jack E. Gutridge | 1980-04-22 |
| 4191107 | Articulated railway car | Ray L. Ferris | 1980-03-04 |
| 4183179 | Sliding door and door guide arrangement for a railway passenger car compartment | Jack E. Gutridge, Roy W. Miller | 1980-01-15 |