Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5348180 | Container having a tamper-evident seal | — | 1994-09-20 |
| 5189778 | Drum recycling system | Thomas P. Vander Sanden, Arthur Tomczak, Lawrence E. Renck | 1993-03-02 |
| 5190209 | Plastic chime overlay for fibre drum | Gerald A. Gordon, William L. Swihart, deceased | 1993-03-02 |
| 5083995 | Method of forming a protective chime overlay | Gerald A. Gordon, William L. Swihart, deceased | 1992-01-28 |
| 4720038 | Corner structure | — | 1988-01-19 |
| 4560080 | Reinforced structure for steel ends of cylindrical shipping containers | Carl Roberson | 1985-12-24 |
| 4457465 | Gas and liquid tight corner structure for a fibre shipping container | Walter R. Wagonseller | 1984-07-03 |