Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4873690 | Optical switch | — | 1989-10-10 |
| 4822273 | Apparatus for stamping a detergent bar | Brian Edmondson | 1989-04-18 |
| 4814967 | Digitally-controlled cycloconverter | M. Blythe Broughton | 1989-03-21 |