Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5484998 | Bar-coded card with coding and reading system | Jan W. Bejnar, Robert Levitt | 1996-01-16 |
| 5367808 | Low power-consumption sign-turner | Robert Levitt | 1994-11-29 |
| 5130696 | Sound-generating containment structure | — | 1992-07-14 |
| 4265159 | Color organ | Robert V. Nemiroff | 1981-05-05 |
| 4183080 | DC to DC converter | — | 1980-01-08 |