Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6109041 | Pulse tube refrigerator | Matthew P. Mitchell | 2000-08-29 |
| 5402938 | Fluid amplifier with improved operating range using tapered shim | — | 1995-04-04 |
| 4436400 | Apparatus for positive vignetting | Phillip S. Charis | 1984-03-13 |
| 4204287 | Knock-down sofa bed with hinged mattress | Manning Lane, Warren Hauck | 1980-05-27 |