Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6047811 | Method and vibratory conveyor | David R. Zittel | 2000-04-11 |
| 5780088 | Electric motor driven abrasive roller peeler and cleaning machine | David R. Zittel | 1998-07-14 |
| 5669288 | Rotating drum food processor with cleaning spray accessible panels | David R. Zittel | 1997-09-23 |