| Clue | Source | Date |
|---|---|---|
| Portable writing surface: 2 wds. | Commuter | 04 Mar 2024 |
| Portable work surface | New York Times | 17 Jun 2021 |
| Old portable writing tables: 2 wds. | ||
| Portable writing surface | New York Times | 05 Sep 2019 |
| Portable writing surface | ||
| Portable writing surface | ||
| Clipboard's relative |