Issued Patents 1989
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4890295 | Laser apparatus | Graeme L. Clark | 1989-12-26 |
| 4858237 | Electron beam apparatus | Clifford R. Weatherup | 1989-08-15 |
| 4839554 | Apparatus for forming an electron beam sheet | Ian A. Strudwick, Clifford R. Weatherup | 1989-06-13 |
| 4825446 | Laser apparatus having cathode bore directing electron beam onto anode | Clifford R. Weatherup, Ian A. Strudwick | 1989-04-25 |
| 4805180 | Discharge tube apparatus | Hugh Menown, Christopher NEALE | 1989-02-14 |