Issued Patents All Time
Showing 26–38 of 38 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8272401 | Compact pressure balanced rotary valve | — | 2012-09-25 |
| 8262783 | Gas separation device | Christopher Stoner, Daryl Musselman | 2012-09-11 |
| 7992486 | Calibrated handheld espresso tamper | Bruce A. Constantine | 2011-08-09 |
| 7758988 | System that includes a fuel cell and an oxygen gas delivery system | Bowie G. Keefer, Michael J. Brown | 2010-07-20 |
| 7250073 | Life support oxygen concentrator | Bowie G. Keefer, Matthew L. Babicki | 2007-07-31 |
| 7094275 | Modular pressure swing adsorption apparatus | Bowie G. Keefer, David G. Doman | 2006-08-22 |
| 6921597 | Electrical current generation system | Bowie G. Keefer, Michael J. Brown | 2005-07-26 |
| 6866950 | Methods and apparatuses for gas separation by pressure swing adsorption with partial gas product feed to fuel cell power source | Denis J. Connor, Bowie G. Keefer, Shanna Knights, Jean St-Pierre | 2005-03-15 |
| 6533846 | Modular pressure swing adsorption apparatus with clearance-type valve seals | Bowie G. Keefer, Les Jeziorowski, Kevin A. Kaupert, Marie Taponat, Christopher Stoner | 2003-03-18 |
| 6514319 | Life support oxygen concentrator | Bowie G. Keefer | 2003-02-04 |
| 6451095 | Modular pressure swing adsorption apparatus | Bowie G. Keefer, David G. Doman | 2002-09-17 |
| 6406523 | Rotary pressure swing adsorption apparatus | Denis J. Connor, David G. Doman, Les Jeziorowski, Bowie G. Keefer, Belinda Larisch +1 more | 2002-06-18 |
| 6056804 | High frequency rotary pressure swing adsorption apparatus | Bowie G. Keefer | 2000-05-02 |