Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5065371 | Depth finder having variable measurement capabilities | Earl W. Spencer, Jr., Kenneth W. Goodman | 1991-11-12 |
| 4943951 | Depth finder with tutorial | Earl W. Spencer, Jr., Bruce L. Bacon | 1990-07-24 |