Issued Patents All Time
Showing 1–10 of 10 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4567919 | Container filling machine and process | Michael Fogg | 1986-02-04 |
| 4443986 | Panel construction system | Larry P. Gzym, Ralph Murrel, Donald A. Richardson, Carl B. Hinrichs | 1984-04-24 |
| D272113 | Furniture panel | Robert L. Russell, Donald A. Richardson, Carl B. Hinrichs | 1984-01-10 |
| 4407101 | Base construction for panel | Donald A. Richardson, Carl B. Hinrichs | 1983-10-04 |
| 4372629 | Combination wire enclosure and wire | Donald A. Richardson, Carl B. Hinrichs | 1983-02-08 |
| 4354611 | Top opening receptacle for trash collection and management systems | Robert L. Propst | 1982-10-19 |
| 4285624 | Trash collection and management system for an office environment | Robert L. Propst | 1981-08-25 |
| 4277079 | Material handling system | Robert L. Propst | 1981-07-07 |
| 4196493 | Caster having roller belts | Robert L. Propst | 1980-04-08 |
| 4184227 | Sanitary caster | Robert L. Propst | 1980-01-22 |