Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4859856 | Telecentric sub-field deflection with vail | Timothy R. Groves, Werner Stickel, Maris A. Sturans | 1989-08-22 |
| 4843330 | Electron beam contactless testing system with grid bias switching | Steven D. Golladay, Fritz J. Hohn | 1989-06-27 |
| 4818885 | Electron beam writing method and system using large range deflection in combination with a continuously moving table | Donald E. Davis, Samuel K. Doran, Merlyn H. Perkins | 1989-04-04 |