Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6109456 | Support device for hanging sheetlike objects using thin support tabs | — | 2000-08-29 |
| 6012594 | Free-standing poster portfolio | — | 2000-01-11 |
| 5890604 | Thin snap support tabs for hang storage of posters and charts and a tool for attaching such tabs to said posters and charts | — | 1999-04-06 |
| 5525089 | Rotatable, demountable blocks of several shapes on a central elastic anchor | — | 1996-06-11 |
| 5395245 | Elastic pattern abacus and tool for changing arrangement of abacus beads | — | 1995-03-07 |
| 5302148 | Rotatable demountable blocks of several shapes on a central elastic anchor | — | 1994-04-12 |
| 4997375 | Elastically interconnected articulated blocks | — | 1991-03-05 |