Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D586790 | Remote control unit | — | 2009-02-17 |
| D582895 | Remote control unit | — | 2008-12-16 |
| D317463 | Electronic test sensor unit | Martin Riddiford, Seamus A. Sharkey | 1991-06-11 |
| D316253 | Electronic sensor pen | Martin Riddiford, Seamus A. Sharkey | 1991-04-16 |
| 4990093 | Teaching and amusement apparatus | Martin Riddiford | 1991-02-05 |
| 4934061 | Draughting tables, drawing boards, drawing instruments and analogous apparatus | Jonathan Knight, Martin Riddiford | 1990-06-19 |
| 4604065 | Teaching or amusement apparatus | Martin Riddiford | 1986-08-05 |