Issued Patents 2021
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11206002 | Media playback system with maximum volume setting | Frank Charlton, Jodi Vautrin, Robert A. Lambourne, Daniel Casimiro, Won So | 2021-12-21 |
| 11184666 | Access control techniques for media playback systems | Keith Thoresz | 2021-11-23 |
| 11076035 | Do not disturb feature for audio notifications | Robert A. Lambourne | 2021-07-27 |