Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5993099 | Combination notebook/file folder having retractable and extendible hangers | Mitchell Greenberg | 1999-11-30 |
| D407441 | Combined notebook/file system | Mitchell Greenberg | 1999-03-30 |
| 5749667 | Notebook system | Shirley Czukerberg | 1998-05-12 |
| 5553959 | Notebook system | Shirley Czukerberg | 1996-09-10 |