Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9840259 | Railway car window assemblies and assembly methods | Robert W. Lewis | 2017-12-12 |
| 4416773 | Valve mechanism for multiple distributor fluid treatment system | Stephen H. Davis | 1983-11-22 |
| 4329225 | Mixed bed deionizer | Stephen H. Davis | 1982-05-11 |