Issued Patents All Time
Showing 26–28 of 28 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4934562 | Cover construction for waste containers | Del E. Walker, Freddie L. Selby, Edward G. Spanknoble, Orville E. Blume, Michael R. O'Hanlon | 1990-06-19 |
| 4909154 | Aerodynamic end closures for railway hopper cars | Del E. Walker | 1990-03-20 |
| 4687552 | Rhodium capped gold IC metallization | Daniel Grogan | 1987-08-18 |