Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5791904 | Speech training aid | Martin J. Russell, Robert W. Series | 1998-08-11 |
| 5679001 | Children's speech training aid | Martin J. Russell, Robert W. Series | 1997-10-21 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5791904 | Speech training aid | Martin J. Russell, Robert W. Series | 1998-08-11 |
| 5679001 | Children's speech training aid | Martin J. Russell, Robert W. Series | 1997-10-21 |