Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4249593 | Heat exchanger with leak detecting double wall tubes | George Bieberbach, Donald J. Bongaards, Alfred Lohmeier | 1981-02-10 |
| 4237968 | Heat exchanger with double wall tubes and three tube sheets | — | 1980-12-09 |