Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7756274 | Sonic landscape system | Leonard Charles Layton, David S. McGrath, Stephen Bennett, Richard J. Cartwright, Geoffrey Alexander Drane | 2010-07-13 |
| 7116789 | Sonic landscape system | Leonard Charles Layton, David S. McGrath, Stephen Bennett, Richard J. Cartwright, Geoffrey Alexander Drane | 2006-10-03 |