Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10551291 | Balanced capillary bridge viscometry | Mark Nicholls | 2020-02-04 |
| 9759644 | Balanced capillary bridge viscometer | Mark Nicholls | 2017-09-12 |
| 9612183 | Modular capillary bridge viscometer | Paul G. Clarke | 2017-04-04 |
| 6182693 | Vapor canister and fuel tank assembly | Gary Francis Stack, Gregory T. Roth | 2001-02-06 |
| 4423309 | Quick heat self regulating electric glow heater | Gary Francis Stack, James W. Hoppenrath, John Richard Taylor | 1983-12-27 |
| 4403207 | Durable titania exhaust gas sensor | James Hoffman | 1983-09-06 |
| 4222840 | Heated solid electrolyte oxygen sensor | George W. Hillebrand | 1980-09-16 |