Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4838158 | Self-inking article marking device | Steven F. Marshall, Darrell R. Johnson | 1989-06-13 |
| 4470864 | Pneumatic labelling apparatus | Darrell R. Johnson | 1984-09-11 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4838158 | Self-inking article marking device | Steven F. Marshall, Darrell R. Johnson | 1989-06-13 |
| 4470864 | Pneumatic labelling apparatus | Darrell R. Johnson | 1984-09-11 |