Issued Patents 1989
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4852604 | Ink monitor system | R. Langdon Wales | 1989-08-01 |
| 4851616 | Touch screen input system | R. Langdon Wales | 1989-07-25 |
| 4848634 | Web feed apparatus | R. Langdon Wales, Albert L. Wright | 1989-07-18 |
| 4828056 | Method and apparatus for weighing material | R. Langdon Wales | 1989-05-09 |
| 4796782 | Ink monitor system | R. Langdon Wales | 1989-01-10 |