Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7834755 | Intelligent remote test/display unit for duct smoke detector | Fred M. Butalla, III | 2010-11-16 |
| 6472980 | Device with built-in signal discrimination and output synchronization circuits | Hsing C. Jen, Fred M. Butalla, III | 2002-10-29 |