Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4992741 | Capacitive sensor and metal detector with a display for quantitatively displaying signals resulting from concealed objects | Keith Douglas | 1991-02-12 |
| 4853617 | Apparatus having capacitive sensor and metal detector for detecting objects concealed behind surfaces | Keith Douglas | 1989-08-01 |