Issued Patents All Time
Showing 25 most recent of 26 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11307159 | Ionic-conducting resistor for exhaust constituent sensors | Alfredo Ibarra Covarrubias | 2022-04-19 |
| 9429540 | Low-temperature activity exhaust sensor | Eric Clyde, Walter T. Symons, James D. Ward, Marsha E. Nottingham | 2016-08-30 |
| 9354215 | Metal to ceramic seal | Evan Schaefer, Wayne M. Chadwick, Mark S. Alexander | 2016-05-31 |
| 7828955 | Ammonia gas sensors | Da Yu Wang, Walter T. Symons, Robert Farhat, Carlos A. Valdes, Elizabeth Briggs +1 more | 2010-11-09 |
| 7280028 | Temperature sensor and method of making the same | Charles Scott Nelson, Paul Kikuchi, James Vargo, Douglas Behrendt, Walter T. Symons +4 more | 2007-10-09 |
| 7214881 | High temperature electrical connection | Charles Scott Nelson, Robert G. Minard, Paul Ruterbusch, Kathryn M. McCauley | 2007-05-08 |
| 7138604 | Ceramic device, sensor device, method of making the same, and method for sensing gas | Walter T. Symons, Charles Scott Nelson, Rick D. Kerr | 2006-11-21 |
| 7074319 | Ammonia gas sensors | Da Yu Wang, Walter T. Symons, Robert Farhat, Carlos A. Valdes, Elizabeth Briggs +1 more | 2006-07-11 |
| 7048844 | Gas sensor and method for use thereof | David K. Chen, Da Yu Wang, Yingjie Lin, Raymond L. Bloink, Devesh Srivastava +1 more | 2006-05-23 |
| 7007653 | Robust torch jet spark plug electrode | William LaBarge, Keith Michael Brenske | 2006-03-07 |
| 6984298 | Gas sensor having an insulating layer | Walter T. Symons, Kerry Gross, William LaBarge, Suresh Baskaran, Craig Habeger +4 more | 2006-01-10 |
| 6800158 | Method of making a sensor and the product produced therefrom | Walter T. Symons, Kerry Gross | 2004-10-05 |
| 6793788 | Method and device for hydrogen and hydrocarbon sensing | Da Yu Wang, Walter T. Symons, Frederick L. Kennard III, Ming-Cheng Wu | 2004-09-21 |
| 6638416 | Hydrogen sensing process | Da Yu Wang, David K. Chen, Walter T. Symons | 2003-10-28 |
| 6611083 | Torch jet spark plug electrode | William LaBarge, Conrad Anderson, Greg Rasmussen | 2003-08-26 |
| 6579435 | Gas sensor | Da Yu Wang, Paul Kikuchi, Walter T. Symons, Larry M. Oberdier | 2003-06-17 |
| 6579436 | Gas sensor and method of producing the same | Da Yu Wang, Paul Kikuchi, Walter T. Symons, Larry M. Oberdier | 2003-06-17 |
| 6572747 | Method for making a wide range sensor element | Richard Fouts, Lora Younkman, Raymond L. Bloink | 2003-06-03 |
| 6562747 | Gas sensor electrolyte | Walter T. Symons, Kerry Gross, Da Yu Wang, Paul Kikuchi | 2003-05-13 |
| 6562215 | Planar exhaust sensor element with enhanced geometry | Charles Scott Nelson, David K. Chen, Lora Younkman, Raymond L. Bloink, Walter T. Symons | 2003-05-13 |
| 6557508 | Robust torch jet spark plug electrode | William LaBarge, Keith Michael Brenske | 2003-05-06 |
| 6544467 | Exhaust gas sensor and the method of manufacture thereof | Walter T. Symons, Kerry Gross | 2003-04-08 |
| 6365036 | Electrode ink formulation for oxygen sensor | — | 2002-04-02 |
| 5602325 | Exhaust sensor having flat plate ceramic sensing element and a sealing package | Mark R. McClanahan | 1997-02-11 |
| 5421300 | Torch jet spark plug | Harold Durling, Robert Johnston | 1995-06-06 |