Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4747509 | Lid with detachable segment | Warren F. Florkiewicz | 1988-05-31 |
| D271650 | Embossed beverage or packaging cup | Van D. Groenewold, James P. Schwartz | 1983-12-06 |
| D267850 | Embossed beverage or packaging cup | Van D. Groenewold, James P. Schwartz | 1983-02-08 |
| D267849 | Embossed beverage or packaging cup | Van D. Groenewold, James P. Schwartz | 1983-02-08 |
| D267633 | Disposable tear-tab lid | — | 1983-01-18 |
| D267395 | Packaging container | Van D. Groenewold, James P. Schwartz | 1982-12-28 |
| D265372 | Embossed beverage or packaging cup | Van D. Groenewold, James P. Schwartz | 1982-07-13 |
| D264557 | Packaging container | Van D. Groenewold, James P. Schwartz | 1982-05-25 |
| 4206845 | Food container | — | 1980-06-10 |
| D255339 | Plant container | — | 1980-06-10 |
| D254166 | Food storage container | — | 1980-02-12 |