Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4880976 | Secondary electron detector for use in a gaseous atmosphere | James F. Mancuso, William B. Maxwell | 1989-11-14 |
| 4823006 | Integrated electron optical/differential pumping/imaging signal detection system for an environmental scanning electron microscope | George C. Lewis | 1989-04-18 |