Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4693751 | Titanium dioxide suspension for use in film coating | Richard F. Heinze | 1987-09-15 |
| 4652313 | Aqueous lake pigment suspension | Richard F. Heinze, Benjamin L. Meyers, Barendra C. Mallik | 1987-03-24 |