Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4688021 | Combined smoke and gas detection apparatus | Robert H. Buck, Kent G. Cowan, Stephen E. Marshall | 1987-08-18 |
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4688021 | Combined smoke and gas detection apparatus | Robert H. Buck, Kent G. Cowan, Stephen E. Marshall | 1987-08-18 |