Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D285416 | Lid for a container | William A. Dart | 1986-09-02 |
| 4582214 | Non-spill drink-through lid | William A. Dart | 1986-04-15 |
| D277167 | Packaging container | — | 1985-01-15 |
| D274983 | Lid for a container | William A. Dart | 1984-08-07 |
| D272794 | Beverage cup | — | 1984-02-28 |
| 4420081 | Step-wall nestable cup | — | 1983-12-13 |
| 4412629 | Non-spill drink-through lid | William A. Dart | 1983-11-01 |
| D270708 | Packaging container | — | 1983-09-27 |