Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D407402 | Portable voice recorder | Cleve A. Graham | 1999-03-30 |
| D406139 | Portable voice recorder | Cleve A. Graham, Spencer L. Mackay | 1999-02-23 |
| D393262 | Portable information storing and retrieving device | Spencer L. Mackay | 1998-04-07 |
| D371554 | Combined portable audio message recording and playback station | Spencer L. Mackay, Cleve A. Graham | 1996-07-09 |
| D371242 | Electric toothbrush with combined charging base and brush-head container therefor | Cleve A. Graham, Spencer L. Mackay | 1996-07-02 |
| D368373 | Combined electric toothbrush and charging base therefor | Cleve A. Graham, Spencer L. Mackay, Stanfield Young | 1996-04-02 |