Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4809329 | Apparatus for use in conjunction with lipreading by the profoundly deaf | John R. Walliker, Adrian J. Fourcin | 1989-02-28 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4809329 | Apparatus for use in conjunction with lipreading by the profoundly deaf | John R. Walliker, Adrian J. Fourcin | 1989-02-28 |