Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4649987 | Apparatus for cleaning the heat-exchanging surfaces of the storage elements of rotary regenerative heat exchangers | Martin Frauenfeld, Georg Goldschmidt, Karlheinz Mock | 1987-03-17 |