Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5730918 | Compacted activated charcoal filter material | Elena J. Nikolskaja, Natalia W. Maltzeva, Evgenia B. Koroljeva | 1998-03-24 |
| 5656069 | Selective carbon filter | Elena J. Nikolskaja, Natalia W. Maltzeva, Evgenia B. Koroljeva | 1997-08-12 |