Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10398916 | Fire suppression system and emergency annunciation system | Michael Walter Erva, Thomas Michael Halt, Donald M. Bjorkman, Dorothy Ruohonen, Steven J. Benda +1 more | 2019-09-03 |
| 9352176 | Fire suppression system and emergency annunciation system | Michael Walter Erva, Thomas Michael Halt, Donald M. Bjorkman, Dorothy Ruohonen, Steven J. Benda +1 more | 2016-05-31 |