| Clue | Source | Date |
|---|---|---|
| Electronic signature producer | ||
| Device for reproducing one's signature | New York Times | 21 Jul 2020 |
| Device for mass-producing signatures | ||
| Device for mass-producing signatures | New York Times | 14 Dec 2019 |
| Signing facilitator | LA Times Daily | 08 Jul 2016 |
| Signing facilitator |