Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4843538 | Multi-level dynamic menu which suppresses display of items previously designated as non-selectable | Leslie A. Lane, Lynn V. Lybeck, David S. Perloff | 1989-06-27 |
| 4805089 | Process control interface system for managing measurement data | Leslie A. Lane, Lynn V. Lybeck, David S. Perloff | 1989-02-14 |