Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10677389 | Check valve | Raymond Hengel, Curtis Roys | 2020-06-09 |
| 10190726 | Check valve | Raymond Hengel, Curtis Roys | 2019-01-29 |
| 9611980 | Check valve | Raymond Hengel, Curtis Roys | 2017-04-04 |
| 9353742 | Check valve | Raymond Hengel, Curtis Roys | 2016-05-31 |
| RE31076 | Cigarette package | — | 1982-11-09 |
| 4207976 | Cigarette package | — | 1980-06-17 |