Summers; David A.
Patent Applications and Registrations
Patent applications and USPTO patent grants for Summers; David A..The latest application filed is for "system and method of controlling fuel cell shutdown".
- Summers; David A. - Vancouver CA
- Summers; David A. - Rolla MO
| Patent | Date |
|---|---|
| System and method of controlling fuel cell shutdown App 20070087233 - Blaszczyk; Janusz ; et al. | 2007-04-19 |
| Methods of operating fuel cells having closed reactant supply systems Grant 7,153,598 - Summers , et al. December 26, 2 | 2006-12-26 |
| Prevention of membrane contamination in electrochemical fuel cells App 20050089746 - James, Gregory A. ; et al. | 2005-04-28 |
| Methods of operating fuel cells having closed reactant supply systems App 20040241504 - Summers, David A. ; et al. | 2004-12-02 |
| Composite ion exchange membrane for use in a fuel cell Grant 6,689,501 - Stone , et al. February 10, 2 | 2004-02-10 |
| Composite ion exchange membrane App 20030059657 - Stone, Charles ; et al. | 2003-03-27 |
| Surgical liquid lance apparatus Grant 5,037,431 - Summers , et al. August 6, 1 | 1991-08-06 |
| Method and apparatus for drilling horizontal holes in geological structures from a vertical bore Grant 4,317,492 - Summers , et al. March 2, 1 | 1982-03-02 |
| Hydromechanical drilling device Grant 4,106,577 - Summers August 15, 1 | 1978-08-15 |
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