Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6877924 | Applicator and dispensing device using same | Richard Gray, Ralph Zissel, Harvey Levine, Lawrence T. Levine | 2005-04-12 |
| D480960 | Dispenser for compartmentalized constituents | Richard Gray, Joel Wittkamp | 2003-10-21 |
| 6168335 | Applicator and dispensing device using same | Richard Gray | 2001-01-02 |
| 6070594 | Brush with retractable bristles | — | 2000-06-06 |
| 4692308 | Automatic chemical analysis | Clifford Riley | 1987-09-08 |