| Number | Date | Country | Kind |
|---|---|---|---|
| 1996-1331 | Jun 1996 | CAX |
| Number | Name | Date | Kind |
|---|---|---|---|
| D299795 | Helstab | Feb 1989 | |
| D305582 | Zapf | Jan 1990 | |
| D305704 | Jones et al. | Jan 1990 | |
| 4516620 | Mulhern | May 1985 |
| Number | Date | Country |
|---|---|---|
| 2228129 | Aug 1990 | GBX |
| Entry |
|---|
| Panel Concepts, Inc. brochure, System Three.O panel, center of page, 1980. |