Issued Patents 2011
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8007047 | Mine refuge | John M. Kennedy | 2011-08-30 |
| 7891574 | Differential temperature display system | John M. Kennedy | 2011-02-22 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8007047 | Mine refuge | John M. Kennedy | 2011-08-30 |
| 7891574 | Differential temperature display system | John M. Kennedy | 2011-02-22 |