Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4839554 | Apparatus for forming an electron beam sheet | Arthur Maitland, Clifford R. Weatherup | 1989-06-13 |
| 4825446 | Laser apparatus having cathode bore directing electron beam onto anode | Arthur Maitland, Clifford R. Weatherup | 1989-04-25 |