Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4628926 | Carbon dioxide rebreathing apparatus | John McElligott, David Lipscomb, Charles W. Williams | 1986-12-16 |
| 4508116 | Carbon dioxide rebreathing apparatus | David Lipscomb, John McElligott, Charles W. Williams | 1985-04-02 |