Ledjeff; Konstantin
Patent Applications and Registrations
Patent applications and USPTO patent grants for Ledjeff; Konstantin.The latest application filed is for "pem fuel cell with structured plates".
- Ledjeff; Konstantin - Bad Krozingen DE
- Ledjeff; Konstantin - Krozingen DE
- Ledjeff; Konstantin - Schwalbach DE
| Patent | Date |
|---|---|
| PEM fuel cell with structured plates Grant 5,952,118 - Ledjeff , et al. September 14, 1 | 1999-09-14 |
| Assembly of single cells to form a diaphragm electrode unit Grant 5,925,477 - Ledjeff , et al. July 20, 1 | 1999-07-20 |
| Polymer electrolyte membrane fuel cell Grant 5,863,672 - Ledjeff , et al. January 26, 1 | 1999-01-26 |
| Battery shaped as a membrane strip containing several cells Grant 5,861,221 - Ledjeff , et al. January 19, 1 | 1999-01-19 |
| Polymer electrolyte membrane for use in fuel cells and electrolysis cells Grant 5,741,408 - Helmer-Metzmann , et al. April 21, 1 | 1998-04-21 |
| Electrode membrane Grant 5,723,086 - Ledjeff , et al. March 3, 1 | 1998-03-03 |
| Polymer electrolyte membrane, and process for the production thereof Grant 5,438,082 - Helmer-Metzmann , et al. August 1, 1 | 1995-08-01 |
| Apparatus for the storage and conversion of energy Grant 5,316,643 - Ahn , et al. May 31, 1 | 1994-05-31 |
| Rebalance cell for a Cr/Fe redox storage system Grant 5,258,241 - Ledjeff , et al. November 2, 1 | 1993-11-02 |
| Recombination device for storage batteries Grant 4,497,880 - Kraft , et al. February 5, 1 | 1985-02-05 |
| Closure device for lead-acid batteries Grant 4,394,423 - Ledjeff July 19, 1 | 1983-07-19 |
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