Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8724833 | Piezoelectric audible signal with spring contacts and retaining and spacer ring | Thomas A. Shain, Raymond W. Hunter, Gary P. Zimmerman | 2014-05-13 |
| 7920069 | Audible, piezoelectric signal with integral visual signal | Thomas A. Shain | 2011-04-05 |