Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6845539 | Multipurpose brush | — | 2005-01-25 |
| 6182322 | Brush with rotary head | — | 2001-02-06 |
| 5820384 | Sound recording | Daniel W. Gravereaux | 1998-10-13 |
| 5569038 | Acoustical prompt recording system and method | Daniel W. Gravereaux | 1996-10-29 |
| D357586 | Brush | — | 1995-04-25 |