Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5791904 | Speech training aid | Robert W. Series, Julie L. Wallace | 1998-08-11 |
| 5679001 | Children's speech training aid | Robert W. Series, Julie L. Wallace | 1997-10-21 |
| 5226091 | Method and apparatus for capturing information in drawing or writing | David Nicholas Lloyd Howell, Colin S. Hilton, John Bridle, Roger K. Moore | 1993-07-06 |