Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7475575 | Theft prevention security device | Jack Greenfield | 2009-01-13 |
| 5709110 | Security system for a lap-top computer | Jack Greenfield | 1998-01-20 |
| 5076079 | Anti-theft device for computers and the like | Jack Greenfield | 1991-12-31 |