Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4431161 | Rotary valve | Robert A. Schmitz | 1984-02-14 |
| 4413920 | Printing ribbon cartridge with flexible ribbon guides | Dan W. Matthias | 1983-11-08 |
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4431161 | Rotary valve | Robert A. Schmitz | 1984-02-14 |
| 4413920 | Printing ribbon cartridge with flexible ribbon guides | Dan W. Matthias | 1983-11-08 |