Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D343130 | Temperature sensor | Roger B. Fell, Thomas K. Kaufman | 1994-01-11 |
| 5250893 | Digital voltmeter | Roger B. Fell | 1993-10-05 |
| 5130640 | Soldering iron testing apparatus | Roger B. Fell, Roger A. Stancliff | 1992-07-14 |
| 5118001 | Enclosure for electrical equipment controls | — | 1992-06-02 |
| D317415 | Temperature probe | — | 1991-06-11 |