Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4228431 | Electrochromic display device | Donald J. Barclay, Colin Leonard Bird, David H. Martin | 1980-10-14 |
| 4203051 | Cathode ray tube apparatus | Michael Heneghan, Brian R. Sowter | 1980-05-13 |