Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5945924 | Fire and smoke detection and control system | Douglas H. Marman, Jacob Y. Wong | 1999-08-31 |
| 5798701 | Self-adjusting smoke detector with self-diagnostic capabilities | Brian Andrew Bernal, Daniel Croft, Kirk R. Johnson, Douglas H. Marman | 1998-08-25 |
| 5708414 | Sensitivity fault indication technique implemented in smoke detector system with self-diagnostic capabilities | Douglas H. Marman, Brent T. Krieger | 1998-01-13 |
| 5565852 | Smoke detector with digital display | Douglas H. Marman, David S. Terrett, Michael E. Fossey | 1996-10-15 |