| Clue | Source | Date |
|---|---|---|
| Big name in electric toothbrushes | New York Times | 15 Mar 2025 |
| Big name in electric toothbrushes | New York Times | 16 May 2023 |
| Big name in electric toothbrushes | New York Times | 25 Oct 2022 |
| Philips electric toothbrush brand | LA Times Daily | 10 Aug 2016 |
| Philips electric toothbrush brand |