Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7938170 | Cold or heat accumulator and process for its manufacture | Robert J. Lang, Wolfgang Kraemer | 2011-05-10 |
| 7500309 | Cold or heat accumulator and process for its manufacture | Robert J. Lang, Wolfgang Kraemer | 2009-03-10 |