Issued Patents All Time
Showing 1–13 of 13 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6427733 | Portable cutter for cut tree stand | Christopher H. Dickhut, William J. Dickhut | 2002-08-06 |
| 6358034 | Molding machine with mold block carriage | John S. Berns | 2002-03-19 |
| 6193496 | Molding machine with mold block carriage | John S. Berns | 2001-02-27 |
| 5645871 | Plastic tile corrugator and mold blocks | John S. Berns | 1997-07-08 |
| 5531583 | Vacuum mold blocks with cooling for corrugated tubing | John S. Berns | 1996-07-02 |
| 5494430 | Plastic tube corrugator with mold blocks | John S. Berns | 1996-02-27 |
| 5489201 | Plastic tile corrugator and mold blocks | John S. Berns | 1996-02-06 |
| 5395278 | Manually manipulatable flexible toy | — | 1995-03-07 |
| 5257924 | Plastic tile corrugator | John S. Berns | 1993-11-02 |
| 5059109 | Corrugated mold block | John S. Berns | 1991-10-22 |
| 4718844 | Corrugated mold block | John S. Berns | 1988-01-12 |
| 4486929 | Tile perforating unit | Alfred Lilienthal | 1984-12-11 |
| 4439130 | Plastic tile corrugator | Alfred Lilienthal | 1984-03-27 |