| Number | Name | Date | Kind |
|---|---|---|---|
| 3131985 | Blonder | May 1964 | A |
| 3436937 | Barrett | Apr 1969 | A |
| 4462317 | Franko et al. | Jul 1984 | A |
| 4584856 | Petersdorff et al. | Apr 1986 | A |
| 4609780 | Clark | Sep 1986 | A |
| 4851652 | Imran | Jul 1989 | A |
| 4896246 | Henderson et al. | Jan 1990 | A |
| 5280518 | Danler et al. | Jan 1994 | A |
| Entry |
|---|
| Supra KeyBox InfraRed Communication Tehnology brochure (showing conceptual design), copyright 2001. |
| “The First KeyBox with a Brain and a Remote Opener,” GE Interlogix Supra brochure, published no earlier than 2002. |